[ARM] 2897/2: PXA2xx IRDA support
Nicolas Pitre [Fri, 28 Oct 2005 15:39:33 +0000 (16:39 +0100)]
Patch from Nicolas Pitre

This is the PXA2xx common IRDA driver, plus platform support
for Lubbock and Mainstone.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Acked-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/generic.c
arch/arm/mach-pxa/lubbock.c
arch/arm/mach-pxa/mainstone.c
drivers/net/irda/Kconfig
drivers/net/irda/Makefile
drivers/net/irda/pxaficp_ir.c [new file with mode: 0644]
include/asm-arm/arch-pxa/irda.h [new file with mode: 0644]
include/asm-arm/arch-pxa/pxa-regs.h

index 218eb96..3248bc9 100644 (file)
@@ -34,6 +34,7 @@
 #include <asm/arch/udc.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/mmc.h>
+#include <asm/arch/irda.h>
 #include <asm/arch/i2c.h>
 
 #include "generic.h"
@@ -301,6 +302,22 @@ static struct platform_device i2s_device = {
        .num_resources  = ARRAY_SIZE(i2s_resources),
 };
 
+static u64 pxaficp_dmamask = ~(u32)0;
+
+static struct platform_device pxaficp_device = {
+       .name           = "pxa2xx-ir",
+       .id             = -1,
+       .dev            = {
+               .dma_mask = &pxaficp_dmamask,
+               .coherent_dma_mask = 0xffffffff,
+       },
+};
+
+void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
+{
+       pxaficp_device.dev.platform_data = info;
+}
+
 static struct platform_device *devices[] __initdata = {
        &pxamci_device,
        &udc_device,
@@ -308,6 +325,7 @@ static struct platform_device *devices[] __initdata = {
        &ffuart_device,
        &btuart_device,
        &stuart_device,
+       &pxaficp_device,
        &i2c_device,
        &i2s_device,
 };
index 69abc7f..beccf45 100644 (file)
@@ -35,6 +35,7 @@
 #include <asm/arch/pxa-regs.h>
 #include <asm/arch/lubbock.h>
 #include <asm/arch/udc.h>
+#include <asm/arch/irda.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/mmc.h>
 
@@ -237,11 +238,30 @@ static struct pxamci_platform_data lubbock_mci_platform_data = {
        .init           = lubbock_mci_init,
 };
 
+static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
+{
+       unsigned long flags;
+
+       local_irq_save(flags);
+       if (mode & IR_SIRMODE) {
+               LUB_MISC_WR &= ~(1 << 4);
+       } else if (mode & IR_FIRMODE) {
+               LUB_MISC_WR |= 1 << 4;
+       }
+       local_irq_restore(flags);
+}
+
+static struct pxaficp_platform_data lubbock_ficp_platform_data = {
+       .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
+       .transceiver_mode = lubbock_irda_transceiver_mode,
+};
+
 static void __init lubbock_init(void)
 {
        pxa_set_udc_info(&udc_info);
        set_pxa_fb_info(&sharp_lm8v31);
        pxa_set_mci_info(&lubbock_mci_platform_data);
+       pxa_set_ficp_info(&lubbock_ficp_platform_data);
        (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 
index 8b4a216..a48c640 100644 (file)
@@ -37,6 +37,7 @@
 #include <asm/arch/audio.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/mmc.h>
+#include <asm/arch/irda.h>
 
 #include "generic.h"
 
@@ -294,6 +295,29 @@ static struct pxamci_platform_data mainstone_mci_platform_data = {
        .exit           = mainstone_mci_exit,
 };
 
+static void mainstone_irda_transceiver_mode(struct device *dev, int mode)
+{
+       unsigned long flags;
+
+       local_irq_save(flags);
+       if (mode & IR_SIRMODE) {
+               MST_MSCWR1 &= ~MST_MSCWR1_IRDA_FIR;
+       } else if (mode & IR_FIRMODE) {
+               MST_MSCWR1 |= MST_MSCWR1_IRDA_FIR;
+       }
+       if (mode & IR_OFF) {
+               MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_OFF;
+       } else {
+               MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_FULL;
+       }
+       local_irq_restore(flags);
+}
+
+static struct pxaficp_platform_data mainstone_ficp_platform_data = {
+       .transceiver_cap  = IR_SIRMODE | IR_FIRMODE | IR_OFF,
+       .transceiver_mode = mainstone_irda_transceiver_mode,
+};
+
 static void __init mainstone_init(void)
 {
        /*
@@ -313,6 +337,7 @@ static void __init mainstone_init(void)
                set_pxa_fb_info(&toshiba_ltm035a776c);
 
        pxa_set_mci_info(&mainstone_mci_platform_data);
+       pxa_set_ficp_info(&mainstone_ficp_platform_data);
 }
 
 
index ca59140..d54156f 100644 (file)
@@ -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
 
index 29a8bd8..e7a8b7f 100644 (file)
@@ -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 (file)
index 0000000..aef80f5
--- /dev/null
@@ -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");
diff --git a/include/asm-arm/arch-pxa/irda.h b/include/asm-arm/arch-pxa/irda.h
new file mode 100644 (file)
index 0000000..748406f
--- /dev/null
@@ -0,0 +1,17 @@
+#ifndef ASMARM_ARCH_IRDA_H
+#define ASMARM_ARCH_IRDA_H
+
+/* board specific transceiver capabilities */
+
+#define IR_OFF         1
+#define IR_SIRMODE     2
+#define IR_FIRMODE     4
+
+struct pxaficp_platform_data {
+       int transceiver_cap;
+       void (*transceiver_mode)(struct device *dev, int mode);
+};
+
+extern void pxa_set_ficp_info(struct pxaficp_platform_data *info);
+
+#endif
index 75f085d..a75a247 100644 (file)
 #define ICCR0_LBM      (1 << 1)        /* Loopback mode */
 #define ICCR0_ITR      (1 << 0)        /* IrDA transmission */
 
-#ifdef CONFIG_PXA27x
 #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 */
-#endif
 
 #ifdef CONFIG_PXA27x
 #define ICSR0_EOC      (1 << 6)        /* DMA End of Descriptor Chain */