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-rw-r--r--kernel/drivers/net/irda/sh_irda.c875
1 files changed, 875 insertions, 0 deletions
diff --git a/kernel/drivers/net/irda/sh_irda.c b/kernel/drivers/net/irda/sh_irda.c
new file mode 100644
index 000000000..c96b46b2c
--- /dev/null
+++ b/kernel/drivers/net/irda/sh_irda.c
@@ -0,0 +1,875 @@
+/*
+ * SuperH IrDA Driver
+ *
+ * Copyright (C) 2010 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * Based on sh_sir.c
+ * Copyright (C) 2009 Renesas Solutions Corp.
+ * Copyright 2006-2009 Analog Devices 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.
+ */
+
+/*
+ * CAUTION
+ *
+ * This driver is very simple.
+ * So, it doesn't have below support now
+ * - MIR/FIR support
+ * - DMA transfer support
+ * - FIFO mode support
+ */
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/clk.h>
+#include <net/irda/wrapper.h>
+#include <net/irda/irda_device.h>
+
+#define DRIVER_NAME "sh_irda"
+
+#define __IRDARAM_LEN 0x1039
+
+#define IRTMR 0x1F00 /* Transfer mode */
+#define IRCFR 0x1F02 /* Configuration */
+#define IRCTR 0x1F04 /* IR control */
+#define IRTFLR 0x1F20 /* Transmit frame length */
+#define IRTCTR 0x1F22 /* Transmit control */
+#define IRRFLR 0x1F40 /* Receive frame length */
+#define IRRCTR 0x1F42 /* Receive control */
+#define SIRISR 0x1F60 /* SIR-UART mode interrupt source */
+#define SIRIMR 0x1F62 /* SIR-UART mode interrupt mask */
+#define SIRICR 0x1F64 /* SIR-UART mode interrupt clear */
+#define SIRBCR 0x1F68 /* SIR-UART mode baud rate count */
+#define MFIRISR 0x1F70 /* MIR/FIR mode interrupt source */
+#define MFIRIMR 0x1F72 /* MIR/FIR mode interrupt mask */
+#define MFIRICR 0x1F74 /* MIR/FIR mode interrupt clear */
+#define CRCCTR 0x1F80 /* CRC engine control */
+#define CRCIR 0x1F86 /* CRC engine input data */
+#define CRCCR 0x1F8A /* CRC engine calculation */
+#define CRCOR 0x1F8E /* CRC engine output data */
+#define FIFOCP 0x1FC0 /* FIFO current pointer */
+#define FIFOFP 0x1FC2 /* FIFO follow pointer */
+#define FIFORSMSK 0x1FC4 /* FIFO receive status mask */
+#define FIFORSOR 0x1FC6 /* FIFO receive status OR */
+#define FIFOSEL 0x1FC8 /* FIFO select */
+#define FIFORS 0x1FCA /* FIFO receive status */
+#define FIFORFL 0x1FCC /* FIFO receive frame length */
+#define FIFORAMCP 0x1FCE /* FIFO RAM current pointer */
+#define FIFORAMFP 0x1FD0 /* FIFO RAM follow pointer */
+#define BIFCTL 0x1FD2 /* BUS interface control */
+#define IRDARAM 0x0000 /* IrDA buffer RAM */
+#define IRDARAM_LEN __IRDARAM_LEN /* - 8/16/32 (read-only for 32) */
+
+/* IRTMR */
+#define TMD_MASK (0x3 << 14) /* Transfer Mode */
+#define TMD_SIR (0x0 << 14)
+#define TMD_MIR (0x3 << 14)
+#define TMD_FIR (0x2 << 14)
+
+#define FIFORIM (1 << 8) /* FIFO receive interrupt mask */
+#define MIM (1 << 4) /* MIR/FIR Interrupt Mask */
+#define SIM (1 << 0) /* SIR Interrupt Mask */
+#define xIM_MASK (FIFORIM | MIM | SIM)
+
+/* IRCFR */
+#define RTO_SHIFT 8 /* shift for Receive Timeout */
+#define RTO (0x3 << RTO_SHIFT)
+
+/* IRTCTR */
+#define ARMOD (1 << 15) /* Auto-Receive Mode */
+#define TE (1 << 0) /* Transmit Enable */
+
+/* IRRFLR */
+#define RFL_MASK (0x1FFF) /* mask for Receive Frame Length */
+
+/* IRRCTR */
+#define RE (1 << 0) /* Receive Enable */
+
+/*
+ * SIRISR, SIRIMR, SIRICR,
+ * MFIRISR, MFIRIMR, MFIRICR
+ */
+#define FRE (1 << 15) /* Frame Receive End */
+#define TROV (1 << 11) /* Transfer Area Overflow */
+#define xIR_9 (1 << 9)
+#define TOT xIR_9 /* for SIR Timeout */
+#define ABTD xIR_9 /* for MIR/FIR Abort Detection */
+#define xIR_8 (1 << 8)
+#define FER xIR_8 /* for SIR Framing Error */
+#define CRCER xIR_8 /* for MIR/FIR CRC error */
+#define FTE (1 << 7) /* Frame Transmit End */
+#define xIR_MASK (FRE | TROV | xIR_9 | xIR_8 | FTE)
+
+/* SIRBCR */
+#define BRC_MASK (0x3F) /* mask for Baud Rate Count */
+
+/* CRCCTR */
+#define CRC_RST (1 << 15) /* CRC Engine Reset */
+#define CRC_CT_MASK 0x0FFF /* mask for CRC Engine Input Data Count */
+
+/* CRCIR */
+#define CRC_IN_MASK 0x0FFF /* mask for CRC Engine Input Data */
+
+/************************************************************************
+
+
+ enum / structure
+
+
+************************************************************************/
+enum sh_irda_mode {
+ SH_IRDA_NONE = 0,
+ SH_IRDA_SIR,
+ SH_IRDA_MIR,
+ SH_IRDA_FIR,
+};
+
+struct sh_irda_self;
+struct sh_irda_xir_func {
+ int (*xir_fre) (struct sh_irda_self *self);
+ int (*xir_trov) (struct sh_irda_self *self);
+ int (*xir_9) (struct sh_irda_self *self);
+ int (*xir_8) (struct sh_irda_self *self);
+ int (*xir_fte) (struct sh_irda_self *self);
+};
+
+struct sh_irda_self {
+ void __iomem *membase;
+ unsigned int irq;
+ struct platform_device *pdev;
+
+ struct net_device *ndev;
+
+ struct irlap_cb *irlap;
+ struct qos_info qos;
+
+ iobuff_t tx_buff;
+ iobuff_t rx_buff;
+
+ enum sh_irda_mode mode;
+ spinlock_t lock;
+
+ struct sh_irda_xir_func *xir_func;
+};
+
+/************************************************************************
+
+
+ common function
+
+
+************************************************************************/
+static void sh_irda_write(struct sh_irda_self *self, u32 offset, u16 data)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&self->lock, flags);
+ iowrite16(data, self->membase + offset);
+ spin_unlock_irqrestore(&self->lock, flags);
+}
+
+static u16 sh_irda_read(struct sh_irda_self *self, u32 offset)
+{
+ unsigned long flags;
+ u16 ret;
+
+ spin_lock_irqsave(&self->lock, flags);
+ ret = ioread16(self->membase + offset);
+ spin_unlock_irqrestore(&self->lock, flags);
+
+ return ret;
+}
+
+static void sh_irda_update_bits(struct sh_irda_self *self, u32 offset,
+ u16 mask, u16 data)
+{
+ unsigned long flags;
+ u16 old, new;
+
+ spin_lock_irqsave(&self->lock, flags);
+ old = ioread16(self->membase + offset);
+ new = (old & ~mask) | data;
+ if (old != new)
+ iowrite16(data, self->membase + offset);
+ spin_unlock_irqrestore(&self->lock, flags);
+}
+
+/************************************************************************
+
+
+ mode function
+
+
+************************************************************************/
+/*=====================================
+ *
+ * common
+ *
+ *=====================================*/
+static void sh_irda_rcv_ctrl(struct sh_irda_self *self, int enable)
+{
+ struct device *dev = &self->ndev->dev;
+
+ sh_irda_update_bits(self, IRRCTR, RE, enable ? RE : 0);
+ dev_dbg(dev, "recv %s\n", enable ? "enable" : "disable");
+}
+
+static int sh_irda_set_timeout(struct sh_irda_self *self, int interval)
+{
+ struct device *dev = &self->ndev->dev;
+
+ if (SH_IRDA_SIR != self->mode)
+ interval = 0;
+
+ if (interval < 0 || interval > 2) {
+ dev_err(dev, "unsupported timeout interval\n");
+ return -EINVAL;
+ }
+
+ sh_irda_update_bits(self, IRCFR, RTO, interval << RTO_SHIFT);
+ return 0;
+}
+
+static int sh_irda_set_baudrate(struct sh_irda_self *self, int baudrate)
+{
+ struct device *dev = &self->ndev->dev;
+ u16 val;
+
+ if (baudrate < 0)
+ return 0;
+
+ if (SH_IRDA_SIR != self->mode) {
+ dev_err(dev, "it is not SIR mode\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Baud rate (bits/s) =
+ * (48 MHz / 26) / (baud rate counter value + 1) x 16
+ */
+ val = (48000000 / 26 / 16 / baudrate) - 1;
+ dev_dbg(dev, "baudrate = %d, val = 0x%02x\n", baudrate, val);
+
+ sh_irda_update_bits(self, SIRBCR, BRC_MASK, val);
+
+ return 0;
+}
+
+static int sh_irda_get_rcv_length(struct sh_irda_self *self)
+{
+ return RFL_MASK & sh_irda_read(self, IRRFLR);
+}
+
+/*=====================================
+ *
+ * NONE MODE
+ *
+ *=====================================*/
+static int sh_irda_xir_fre(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+ dev_err(dev, "none mode: frame recv\n");
+ return 0;
+}
+
+static int sh_irda_xir_trov(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+ dev_err(dev, "none mode: buffer ram over\n");
+ return 0;
+}
+
+static int sh_irda_xir_9(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+ dev_err(dev, "none mode: time over\n");
+ return 0;
+}
+
+static int sh_irda_xir_8(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+ dev_err(dev, "none mode: framing error\n");
+ return 0;
+}
+
+static int sh_irda_xir_fte(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+ dev_err(dev, "none mode: frame transmit end\n");
+ return 0;
+}
+
+static struct sh_irda_xir_func sh_irda_xir_func = {
+ .xir_fre = sh_irda_xir_fre,
+ .xir_trov = sh_irda_xir_trov,
+ .xir_9 = sh_irda_xir_9,
+ .xir_8 = sh_irda_xir_8,
+ .xir_fte = sh_irda_xir_fte,
+};
+
+/*=====================================
+ *
+ * MIR/FIR MODE
+ *
+ * MIR/FIR are not supported now
+ *=====================================*/
+static struct sh_irda_xir_func sh_irda_mfir_func = {
+ .xir_fre = sh_irda_xir_fre,
+ .xir_trov = sh_irda_xir_trov,
+ .xir_9 = sh_irda_xir_9,
+ .xir_8 = sh_irda_xir_8,
+ .xir_fte = sh_irda_xir_fte,
+};
+
+/*=====================================
+ *
+ * SIR MODE
+ *
+ *=====================================*/
+static int sh_irda_sir_fre(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+ u16 data16;
+ u8 *data = (u8 *)&data16;
+ int len = sh_irda_get_rcv_length(self);
+ int i, j;
+
+ if (len > IRDARAM_LEN)
+ len = IRDARAM_LEN;
+
+ dev_dbg(dev, "frame recv length = %d\n", len);
+
+ for (i = 0; i < len; i++) {
+ j = i % 2;
+ if (!j)
+ data16 = sh_irda_read(self, IRDARAM + i);
+
+ async_unwrap_char(self->ndev, &self->ndev->stats,
+ &self->rx_buff, data[j]);
+ }
+ self->ndev->last_rx = jiffies;
+
+ sh_irda_rcv_ctrl(self, 1);
+
+ return 0;
+}
+
+static int sh_irda_sir_trov(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+
+ dev_err(dev, "buffer ram over\n");
+ sh_irda_rcv_ctrl(self, 1);
+ return 0;
+}
+
+static int sh_irda_sir_tot(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+
+ dev_err(dev, "time over\n");
+ sh_irda_set_baudrate(self, 9600);
+ sh_irda_rcv_ctrl(self, 1);
+ return 0;
+}
+
+static int sh_irda_sir_fer(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+
+ dev_err(dev, "framing error\n");
+ sh_irda_rcv_ctrl(self, 1);
+ return 0;
+}
+
+static int sh_irda_sir_fte(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+
+ dev_dbg(dev, "frame transmit end\n");
+ netif_wake_queue(self->ndev);
+
+ return 0;
+}
+
+static struct sh_irda_xir_func sh_irda_sir_func = {
+ .xir_fre = sh_irda_sir_fre,
+ .xir_trov = sh_irda_sir_trov,
+ .xir_9 = sh_irda_sir_tot,
+ .xir_8 = sh_irda_sir_fer,
+ .xir_fte = sh_irda_sir_fte,
+};
+
+static void sh_irda_set_mode(struct sh_irda_self *self, enum sh_irda_mode mode)
+{
+ struct device *dev = &self->ndev->dev;
+ struct sh_irda_xir_func *func;
+ const char *name;
+ u16 data;
+
+ switch (mode) {
+ case SH_IRDA_SIR:
+ name = "SIR";
+ data = TMD_SIR;
+ func = &sh_irda_sir_func;
+ break;
+ case SH_IRDA_MIR:
+ name = "MIR";
+ data = TMD_MIR;
+ func = &sh_irda_mfir_func;
+ break;
+ case SH_IRDA_FIR:
+ name = "FIR";
+ data = TMD_FIR;
+ func = &sh_irda_mfir_func;
+ break;
+ default:
+ name = "NONE";
+ data = 0;
+ func = &sh_irda_xir_func;
+ break;
+ }
+
+ self->mode = mode;
+ self->xir_func = func;
+ sh_irda_update_bits(self, IRTMR, TMD_MASK, data);
+
+ dev_dbg(dev, "switch to %s mode", name);
+}
+
+/************************************************************************
+
+
+ irq function
+
+
+************************************************************************/
+static void sh_irda_set_irq_mask(struct sh_irda_self *self)
+{
+ u16 tmr_hole;
+ u16 xir_reg;
+
+ /* set all mask */
+ sh_irda_update_bits(self, IRTMR, xIM_MASK, xIM_MASK);
+ sh_irda_update_bits(self, SIRIMR, xIR_MASK, xIR_MASK);
+ sh_irda_update_bits(self, MFIRIMR, xIR_MASK, xIR_MASK);
+
+ /* clear irq */
+ sh_irda_update_bits(self, SIRICR, xIR_MASK, xIR_MASK);
+ sh_irda_update_bits(self, MFIRICR, xIR_MASK, xIR_MASK);
+
+ switch (self->mode) {
+ case SH_IRDA_SIR:
+ tmr_hole = SIM;
+ xir_reg = SIRIMR;
+ break;
+ case SH_IRDA_MIR:
+ case SH_IRDA_FIR:
+ tmr_hole = MIM;
+ xir_reg = MFIRIMR;
+ break;
+ default:
+ tmr_hole = 0;
+ xir_reg = 0;
+ break;
+ }
+
+ /* open mask */
+ if (xir_reg) {
+ sh_irda_update_bits(self, IRTMR, tmr_hole, 0);
+ sh_irda_update_bits(self, xir_reg, xIR_MASK, 0);
+ }
+}
+
+static irqreturn_t sh_irda_irq(int irq, void *dev_id)
+{
+ struct sh_irda_self *self = dev_id;
+ struct sh_irda_xir_func *func = self->xir_func;
+ u16 isr = sh_irda_read(self, SIRISR);
+
+ /* clear irq */
+ sh_irda_write(self, SIRICR, isr);
+
+ if (isr & FRE)
+ func->xir_fre(self);
+ if (isr & TROV)
+ func->xir_trov(self);
+ if (isr & xIR_9)
+ func->xir_9(self);
+ if (isr & xIR_8)
+ func->xir_8(self);
+ if (isr & FTE)
+ func->xir_fte(self);
+
+ return IRQ_HANDLED;
+}
+
+/************************************************************************
+
+
+ CRC function
+
+
+************************************************************************/
+static void sh_irda_crc_reset(struct sh_irda_self *self)
+{
+ sh_irda_write(self, CRCCTR, CRC_RST);
+}
+
+static void sh_irda_crc_add(struct sh_irda_self *self, u16 data)
+{
+ sh_irda_write(self, CRCIR, data & CRC_IN_MASK);
+}
+
+static u16 sh_irda_crc_cnt(struct sh_irda_self *self)
+{
+ return CRC_CT_MASK & sh_irda_read(self, CRCCTR);
+}
+
+static u16 sh_irda_crc_out(struct sh_irda_self *self)
+{
+ return sh_irda_read(self, CRCOR);
+}
+
+static int sh_irda_crc_init(struct sh_irda_self *self)
+{
+ struct device *dev = &self->ndev->dev;
+ int ret = -EIO;
+ u16 val;
+
+ sh_irda_crc_reset(self);
+
+ sh_irda_crc_add(self, 0xCC);
+ sh_irda_crc_add(self, 0xF5);
+ sh_irda_crc_add(self, 0xF1);
+ sh_irda_crc_add(self, 0xA7);
+
+ val = sh_irda_crc_cnt(self);
+ if (4 != val) {
+ dev_err(dev, "CRC count error %x\n", val);
+ goto crc_init_out;
+ }
+
+ val = sh_irda_crc_out(self);
+ if (0x51DF != val) {
+ dev_err(dev, "CRC result error%x\n", val);
+ goto crc_init_out;
+ }
+
+ ret = 0;
+
+crc_init_out:
+
+ sh_irda_crc_reset(self);
+ return ret;
+}
+
+/************************************************************************
+
+
+ iobuf function
+
+
+************************************************************************/
+static void sh_irda_remove_iobuf(struct sh_irda_self *self)
+{
+ kfree(self->rx_buff.head);
+
+ self->tx_buff.head = NULL;
+ self->tx_buff.data = NULL;
+ self->rx_buff.head = NULL;
+ self->rx_buff.data = NULL;
+}
+
+static int sh_irda_init_iobuf(struct sh_irda_self *self, int rxsize, int txsize)
+{
+ if (self->rx_buff.head ||
+ self->tx_buff.head) {
+ dev_err(&self->ndev->dev, "iobuff has already existed.");
+ return -EINVAL;
+ }
+
+ /* rx_buff */
+ self->rx_buff.head = kmalloc(rxsize, GFP_KERNEL);
+ if (!self->rx_buff.head)
+ return -ENOMEM;
+
+ self->rx_buff.truesize = rxsize;
+ self->rx_buff.in_frame = FALSE;
+ self->rx_buff.state = OUTSIDE_FRAME;
+ self->rx_buff.data = self->rx_buff.head;
+
+ /* tx_buff */
+ self->tx_buff.head = self->membase + IRDARAM;
+ self->tx_buff.truesize = IRDARAM_LEN;
+
+ return 0;
+}
+
+/************************************************************************
+
+
+ net_device_ops function
+
+
+************************************************************************/
+static int sh_irda_hard_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct sh_irda_self *self = netdev_priv(ndev);
+ struct device *dev = &self->ndev->dev;
+ int speed = irda_get_next_speed(skb);
+ int ret;
+
+ dev_dbg(dev, "hard xmit\n");
+
+ netif_stop_queue(ndev);
+ sh_irda_rcv_ctrl(self, 0);
+
+ ret = sh_irda_set_baudrate(self, speed);
+ if (ret < 0)
+ goto sh_irda_hard_xmit_end;
+
+ self->tx_buff.len = 0;
+ if (skb->len) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&self->lock, flags);
+ self->tx_buff.len = async_wrap_skb(skb,
+ self->tx_buff.head,
+ self->tx_buff.truesize);
+ spin_unlock_irqrestore(&self->lock, flags);
+
+ if (self->tx_buff.len > self->tx_buff.truesize)
+ self->tx_buff.len = self->tx_buff.truesize;
+
+ sh_irda_write(self, IRTFLR, self->tx_buff.len);
+ sh_irda_write(self, IRTCTR, ARMOD | TE);
+ } else
+ goto sh_irda_hard_xmit_end;
+
+ dev_kfree_skb(skb);
+
+ return 0;
+
+sh_irda_hard_xmit_end:
+ sh_irda_set_baudrate(self, 9600);
+ netif_wake_queue(self->ndev);
+ sh_irda_rcv_ctrl(self, 1);
+ dev_kfree_skb(skb);
+
+ return ret;
+
+}
+
+static int sh_irda_ioctl(struct net_device *ndev, struct ifreq *ifreq, int cmd)
+{
+ /*
+ * FIXME
+ *
+ * This function is needed for irda framework.
+ * But nothing to do now
+ */
+ return 0;
+}
+
+static struct net_device_stats *sh_irda_stats(struct net_device *ndev)
+{
+ struct sh_irda_self *self = netdev_priv(ndev);
+
+ return &self->ndev->stats;
+}
+
+static int sh_irda_open(struct net_device *ndev)
+{
+ struct sh_irda_self *self = netdev_priv(ndev);
+ int err;
+
+ pm_runtime_get_sync(&self->pdev->dev);
+ err = sh_irda_crc_init(self);
+ if (err)
+ goto open_err;
+
+ sh_irda_set_mode(self, SH_IRDA_SIR);
+ sh_irda_set_timeout(self, 2);
+ sh_irda_set_baudrate(self, 9600);
+
+ self->irlap = irlap_open(ndev, &self->qos, DRIVER_NAME);
+ if (!self->irlap) {
+ err = -ENODEV;
+ goto open_err;
+ }
+
+ netif_start_queue(ndev);
+ sh_irda_rcv_ctrl(self, 1);
+ sh_irda_set_irq_mask(self);
+
+ dev_info(&ndev->dev, "opened\n");
+
+ return 0;
+
+open_err:
+ pm_runtime_put_sync(&self->pdev->dev);
+
+ return err;
+}
+
+static int sh_irda_stop(struct net_device *ndev)
+{
+ struct sh_irda_self *self = netdev_priv(ndev);
+
+ /* Stop IrLAP */
+ if (self->irlap) {
+ irlap_close(self->irlap);
+ self->irlap = NULL;
+ }
+
+ netif_stop_queue(ndev);
+ pm_runtime_put_sync(&self->pdev->dev);
+
+ dev_info(&ndev->dev, "stopped\n");
+
+ return 0;
+}
+
+static const struct net_device_ops sh_irda_ndo = {
+ .ndo_open = sh_irda_open,
+ .ndo_stop = sh_irda_stop,
+ .ndo_start_xmit = sh_irda_hard_xmit,
+ .ndo_do_ioctl = sh_irda_ioctl,
+ .ndo_get_stats = sh_irda_stats,
+};
+
+/************************************************************************
+
+
+ platform_driver function
+
+
+************************************************************************/
+static int sh_irda_probe(struct platform_device *pdev)
+{
+ struct net_device *ndev;
+ struct sh_irda_self *self;
+ struct resource *res;
+ int irq;
+ int err = -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irq = platform_get_irq(pdev, 0);
+ if (!res || irq < 0) {
+ dev_err(&pdev->dev, "Not enough platform resources.\n");
+ goto exit;
+ }
+
+ ndev = alloc_irdadev(sizeof(*self));
+ if (!ndev)
+ goto exit;
+
+ self = netdev_priv(ndev);
+ self->membase = ioremap_nocache(res->start, resource_size(res));
+ if (!self->membase) {
+ err = -ENXIO;
+ dev_err(&pdev->dev, "Unable to ioremap.\n");
+ goto err_mem_1;
+ }
+
+ err = sh_irda_init_iobuf(self, IRDA_SKB_MAX_MTU, IRDA_SIR_MAX_FRAME);
+ if (err)
+ goto err_mem_2;
+
+ self->pdev = pdev;
+ pm_runtime_enable(&pdev->dev);
+
+ irda_init_max_qos_capabilies(&self->qos);
+
+ ndev->netdev_ops = &sh_irda_ndo;
+ ndev->irq = irq;
+
+ self->ndev = ndev;
+ self->qos.baud_rate.bits &= IR_9600; /* FIXME */
+ self->qos.min_turn_time.bits = 1; /* 10 ms or more */
+ spin_lock_init(&self->lock);
+
+ irda_qos_bits_to_value(&self->qos);
+
+ err = register_netdev(ndev);
+ if (err)
+ goto err_mem_4;
+
+ platform_set_drvdata(pdev, ndev);
+ err = devm_request_irq(&pdev->dev, irq, sh_irda_irq, 0, "sh_irda", self);
+ if (err) {
+ dev_warn(&pdev->dev, "Unable to attach sh_irda interrupt\n");
+ goto err_mem_4;
+ }
+
+ dev_info(&pdev->dev, "SuperH IrDA probed\n");
+
+ goto exit;
+
+err_mem_4:
+ pm_runtime_disable(&pdev->dev);
+ sh_irda_remove_iobuf(self);
+err_mem_2:
+ iounmap(self->membase);
+err_mem_1:
+ free_netdev(ndev);
+exit:
+ return err;
+}
+
+static int sh_irda_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct sh_irda_self *self = netdev_priv(ndev);
+
+ if (!self)
+ return 0;
+
+ unregister_netdev(ndev);
+ pm_runtime_disable(&pdev->dev);
+ sh_irda_remove_iobuf(self);
+ iounmap(self->membase);
+ free_netdev(ndev);
+
+ return 0;
+}
+
+static int sh_irda_runtime_nop(struct device *dev)
+{
+ /* Runtime PM callback shared between ->runtime_suspend()
+ * and ->runtime_resume(). Simply returns success.
+ *
+ * This driver re-initializes all registers after
+ * pm_runtime_get_sync() anyway so there is no need
+ * to save and restore registers here.
+ */
+ return 0;
+}
+
+static const struct dev_pm_ops sh_irda_pm_ops = {
+ .runtime_suspend = sh_irda_runtime_nop,
+ .runtime_resume = sh_irda_runtime_nop,
+};
+
+static struct platform_driver sh_irda_driver = {
+ .probe = sh_irda_probe,
+ .remove = sh_irda_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .pm = &sh_irda_pm_ops,
+ },
+};
+
+module_platform_driver(sh_irda_driver);
+
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
+MODULE_DESCRIPTION("SuperH IrDA driver");
+MODULE_LICENSE("GPL");