* 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/platform_device.h>
-#include <linux/pm.h>
+#include <linux/clk.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>
+#include <mach/dma.h>
+#include <mach/irda.h>
+#include <mach/hardware.h>
+#include <mach/pxa-regs.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) /* Recieve 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
int txdma;
int rxdma;
- struct net_device_stats stats;
struct irlap_cb *irlap;
struct qos_info qos;
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(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_enable(si->fir_clk);
+}
+
+static inline void pxa_irda_enable_sirclk(struct pxa_irda *si)
+{
+ si->cur_clk = si->sir_clk;
+ clk_enable(si->sir_clk);
+}
+
#define IS_FIR(si) ((si)->speed >= 4000000)
#define IRDA_FRAME_SIZE_LIMIT 2047
DCSR(si->rxdma) &= ~DCSR_RUN;
/* disable FICP */
ICCR0 = 0;
- pxa_set_cken(CKEN13_FICP, 0);
+ pxa_irda_disable_clk(si);
/* 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);
+ pxa_irda_enable_sirclk(si);
}
/* disable STUART first */
/* disable STUART */
STIER = 0;
STISR = 0;
- pxa_set_cken(CKEN5_STUART, 0);
+ pxa_irda_disable_clk(si);
/* 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);
+ pxa_irda_enable_firclk(si);
si->speed = speed;
pxa_irda_fir_dma_rx_start(si);
}
/* SIR interrupt service routine. */
-static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id, struct pt_regs *regs)
+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);
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++;
+ dev->stats.rx_errors++;
if (lsr & LSR_FE)
- si->stats.rx_frame_errors++;
+ dev->stats.rx_frame_errors++;
if (lsr & LSR_OE)
- si->stats.rx_fifo_errors++;
+ dev->stats.rx_fifo_errors++;
} else {
- si->stats.rx_bytes++;
- async_unwrap_char(dev, &si->stats, &si->rx_buff, data);
+ dev->stats.rx_bytes++;
+ async_unwrap_char(dev, &dev->stats,
+ &si->rx_buff, data);
}
lsr = STLSR;
}
- dev->last_rx = jiffies;
si->last_oscr = OSCR;
break;
case 0x0C: /* Character Timeout Indication */
do {
- si->stats.rx_bytes++;
- async_unwrap_char(dev, &si->stats, &si->rx_buff, STRBR);
+ dev->stats.rx_bytes++;
+ async_unwrap_char(dev, &dev->stats, &si->rx_buff, STRBR);
} while (STLSR & LSR_DR);
- dev->last_rx = jiffies;
si->last_oscr = OSCR;
break;
}
if (si->tx_buff.len == 0) {
- si->stats.tx_packets++;
- si->stats.tx_bytes += si->tx_buff.data -
- si->tx_buff.head;
+ 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)
}
/* FIR Receive DMA interrupt handler */
-static void pxa_irda_fir_dma_rx_irq(int channel, void *data, struct pt_regs *regs)
+static void pxa_irda_fir_dma_rx_irq(int channel, void *data)
{
int dcsr = DCSR(channel);
}
/* FIR Transmit DMA interrupt handler */
-static void pxa_irda_fir_dma_tx_irq(int channel, void *data, struct pt_regs *regs)
+static void pxa_irda_fir_dma_tx_irq(int channel, void *data)
{
struct net_device *dev = data;
struct pxa_irda *si = netdev_priv(dev);
DCSR(channel) = dcsr & ~DCSR_RUN;
if (dcsr & DCSR_ENDINTR) {
- si->stats.tx_packets++;
- si->stats.tx_bytes += si->dma_tx_buff_len;
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += si->dma_tx_buff_len;
} else {
- si->stats.tx_errors++;
+ dev->stats.tx_errors++;
}
while (ICSR1 & ICSR1_TBY)
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)
+static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, int icsr0)
{
unsigned int len, stat, data;
data = ICDR;
if (stat & (ICSR1_CRE | ICSR1_ROR)) {
- si->stats.rx_errors++;
+ dev->stats.rx_errors++;
if (stat & ICSR1_CRE) {
printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n");
- si->stats.rx_crc_errors++;
+ dev->stats.rx_crc_errors++;
}
if (stat & ICSR1_ROR) {
printk(KERN_DEBUG "pxa_ir: fir receive overrun\n");
- si->stats.rx_frame_errors++;
+ dev->stats.rx_over_errors++;
}
} else {
si->dma_rx_buff[len++] = data;
if (stat & ICSR1_EOF) {
/* end of frame. */
- struct sk_buff *skb = alloc_skb(len+1,GFP_ATOMIC);
+ 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");
- si->stats.rx_dropped++;
+ dev->stats.rx_dropped++;
return;
}
/* Align IP header to 20 bytes */
skb_reserve(skb, 1);
- memcpy(skb->data, si->dma_rx_buff, len);
+ skb_copy_to_linear_data(skb, si->dma_rx_buff, len);
skb_put(skb, len);
/* Feed it to IrLAP */
skb->dev = dev;
- skb->mac.raw = skb->data;
+ skb_reset_mac_header(skb);
skb->protocol = htons(ETH_P_IRDA);
netif_rx(skb);
- si->stats.rx_packets++;
- si->stats.rx_bytes += len;
-
- dev->last_rx = jiffies;
+ 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 pt_regs *regs)
+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;
+ int icsr0, i = 64;
/* stop RX DMA */
DCSR(si->rxdma) &= ~DCSR_RUN;
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++;
+ dev->stats.rx_frame_errors++;
} else {
printk(KERN_DEBUG "pxa_ir: fir receive abort\n");
- si->stats.rx_errors++;
+ dev->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);
+ 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;
}
unsigned long mtt = irda_get_mtt(skb);
si->dma_tx_buff_len = skb->len;
- memcpy(si->dma_tx_buff, skb->data, skb->len);
+ skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len);
if (mtt)
while ((unsigned)(OSCR - si->last_oscr)/4 < mtt)
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 */
ICCR2 = ICCR2_TXP | ICCR2_TRIG_32;
/* configure DMAC */
- DRCMR17 = si->rxdma | DRCMR_MAPVLD;
- DRCMR18 = si->txdma | DRCMR_MAPVLD;
+ DRCMR(17) = si->rxdma | DRCMR_MAPVLD;
+ DRCMR(18) = si->txdma | DRCMR_MAPVLD;
/* force SIR reinitialization */
si->speed = 4000000;
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;
+ /* disable the STUART or FICP clocks */
+ pxa_irda_disable_clk(si);
+
+ DRCMR(17) = 0;
+ DRCMR(18) = 0;
local_irq_restore(flags);
return 0;
}
-static int pxa_irda_suspend(struct device *_dev, pm_message_t state)
+static int pxa_irda_suspend(struct platform_device *_dev, pm_message_t state)
{
- struct net_device *dev = dev_get_drvdata(_dev);
+ struct net_device *dev = platform_get_drvdata(_dev);
struct pxa_irda *si;
if (dev && netif_running(dev)) {
return 0;
}
-static int pxa_irda_resume(struct device *_dev)
+static int pxa_irda_resume(struct platform_device *_dev)
{
- struct net_device *dev = dev_get_drvdata(_dev);
+ struct net_device *dev = platform_get_drvdata(_dev);
struct pxa_irda *si;
if (dev && netif_running(dev)) {
return io->head ? 0 : -ENOMEM;
}
-static int pxa_irda_probe(struct device *_dev)
+static int pxa_irda_probe(struct platform_device *pdev)
{
- struct platform_device *pdev = to_platform_device(_dev);
struct net_device *dev;
struct pxa_irda *si;
unsigned int baudrate_mask;
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
*/
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);
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);
return err;
}
-static int pxa_irda_remove(struct device *_dev)
+static int pxa_irda_remove(struct platform_device *_dev)
{
- struct net_device *dev = dev_get_drvdata(_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);
}
return 0;
}
-static struct device_driver pxa_ir_driver = {
- .name = "pxa2xx-ir",
- .bus = &platform_bus_type,
+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,
static int __init pxa_irda_init(void)
{
- return driver_register(&pxa_ir_driver);
+ return platform_driver_register(&pxa_ir_driver);
}
static void __exit pxa_irda_exit(void)
{
- driver_unregister(&pxa_ir_driver);
+ platform_driver_unregister(&pxa_ir_driver);
}
module_init(pxa_irda_init);
module_exit(pxa_irda_exit);
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa2xx-ir");
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