![Graff Yang](/assets/img/avatar_default.png)
Signed-off-by: Graff Yang <graff.yang@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
821 lines
18 KiB
C
821 lines
18 KiB
C
/*
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* Blackfin Infra-red Driver
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*
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* Copyright 2006-2009 Analog Devices Inc.
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*
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* Enter bugs at http://blackfin.uclinux.org/
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*
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* Licensed under the GPL-2 or later.
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*
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*/
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#include "bfin_sir.h"
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#ifdef CONFIG_SIR_BFIN_DMA
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#define DMA_SIR_RX_XCNT 10
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#define DMA_SIR_RX_YCNT (PAGE_SIZE / DMA_SIR_RX_XCNT)
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#define DMA_SIR_RX_FLUSH_JIFS (HZ * 4 / 250)
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#endif
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#if ANOMALY_05000447
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static int max_rate = 57600;
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#else
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static int max_rate = 115200;
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#endif
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static void turnaround_delay(unsigned long last_jif, int mtt)
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{
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long ticks;
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mtt = mtt < 10000 ? 10000 : mtt;
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ticks = 1 + mtt / (USEC_PER_SEC / HZ);
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schedule_timeout_uninterruptible(ticks);
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}
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static void __devinit bfin_sir_init_ports(struct bfin_sir_port *sp, struct platform_device *pdev)
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{
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int i;
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struct resource *res;
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for (i = 0; i < pdev->num_resources; i++) {
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res = &pdev->resource[i];
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switch (res->flags) {
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case IORESOURCE_MEM:
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sp->membase = (void __iomem *)res->start;
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break;
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case IORESOURCE_IRQ:
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sp->irq = res->start;
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break;
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case IORESOURCE_DMA:
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sp->rx_dma_channel = res->start;
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sp->tx_dma_channel = res->end;
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break;
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default:
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break;
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}
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}
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sp->clk = get_sclk();
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#ifdef CONFIG_SIR_BFIN_DMA
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sp->tx_done = 1;
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init_timer(&(sp->rx_dma_timer));
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#endif
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}
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static void bfin_sir_stop_tx(struct bfin_sir_port *port)
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{
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#ifdef CONFIG_SIR_BFIN_DMA
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disable_dma(port->tx_dma_channel);
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#endif
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while (!(SIR_UART_GET_LSR(port) & THRE)) {
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cpu_relax();
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continue;
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}
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SIR_UART_STOP_TX(port);
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}
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static void bfin_sir_enable_tx(struct bfin_sir_port *port)
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{
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SIR_UART_ENABLE_TX(port);
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}
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static void bfin_sir_stop_rx(struct bfin_sir_port *port)
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{
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SIR_UART_STOP_RX(port);
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}
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static void bfin_sir_enable_rx(struct bfin_sir_port *port)
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{
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SIR_UART_ENABLE_RX(port);
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}
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static int bfin_sir_set_speed(struct bfin_sir_port *port, int speed)
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{
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int ret = -EINVAL;
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unsigned int quot;
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unsigned short val, lsr, lcr;
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static int utime;
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int count = 10;
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lcr = WLS(8);
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switch (speed) {
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case 9600:
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case 19200:
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case 38400:
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case 57600:
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case 115200:
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quot = (port->clk + (8 * speed)) / (16 * speed)\
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- ANOMALY_05000230;
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do {
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udelay(utime);
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lsr = SIR_UART_GET_LSR(port);
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} while (!(lsr & TEMT) && count--);
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/* The useconds for 1 bits to transmit */
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utime = 1000000 / speed + 1;
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/* Clear UCEN bit to reset the UART state machine
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* and control registers
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*/
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val = SIR_UART_GET_GCTL(port);
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val &= ~UCEN;
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SIR_UART_PUT_GCTL(port, val);
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/* Set DLAB in LCR to Access THR RBR IER */
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SIR_UART_SET_DLAB(port);
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SSYNC();
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SIR_UART_PUT_DLL(port, quot & 0xFF);
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SIR_UART_PUT_DLH(port, (quot >> 8) & 0xFF);
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SSYNC();
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/* Clear DLAB in LCR */
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SIR_UART_CLEAR_DLAB(port);
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SSYNC();
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SIR_UART_PUT_LCR(port, lcr);
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val = SIR_UART_GET_GCTL(port);
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val |= UCEN;
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SIR_UART_PUT_GCTL(port, val);
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ret = 0;
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break;
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default:
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printk(KERN_WARNING "bfin_sir: Invalid speed %d\n", speed);
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break;
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}
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val = SIR_UART_GET_GCTL(port);
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/* If not add the 'RPOLC', we can't catch the receive interrupt.
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* It's related with the HW layout and the IR transiver.
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*/
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val |= IREN | RPOLC;
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SIR_UART_PUT_GCTL(port, val);
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return ret;
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}
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static int bfin_sir_is_receiving(struct net_device *dev)
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{
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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if (!(SIR_UART_GET_IER(port) & ERBFI))
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return 0;
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return self->rx_buff.state != OUTSIDE_FRAME;
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}
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#ifdef CONFIG_SIR_BFIN_PIO
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static void bfin_sir_tx_chars(struct net_device *dev)
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{
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unsigned int chr;
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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if (self->tx_buff.len != 0) {
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chr = *(self->tx_buff.data);
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SIR_UART_PUT_CHAR(port, chr);
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self->tx_buff.data++;
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self->tx_buff.len--;
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} else {
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self->stats.tx_packets++;
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self->stats.tx_bytes += self->tx_buff.data - self->tx_buff.head;
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if (self->newspeed) {
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bfin_sir_set_speed(port, self->newspeed);
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self->speed = self->newspeed;
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self->newspeed = 0;
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}
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bfin_sir_stop_tx(port);
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bfin_sir_enable_rx(port);
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/* I'm hungry! */
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netif_wake_queue(dev);
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}
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}
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static void bfin_sir_rx_chars(struct net_device *dev)
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{
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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unsigned char ch;
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SIR_UART_CLEAR_LSR(port);
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ch = SIR_UART_GET_CHAR(port);
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async_unwrap_char(dev, &self->stats, &self->rx_buff, ch);
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dev->last_rx = jiffies;
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}
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static irqreturn_t bfin_sir_rx_int(int irq, void *dev_id)
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{
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struct net_device *dev = dev_id;
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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spin_lock(&self->lock);
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while ((SIR_UART_GET_LSR(port) & DR))
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bfin_sir_rx_chars(dev);
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spin_unlock(&self->lock);
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return IRQ_HANDLED;
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}
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static irqreturn_t bfin_sir_tx_int(int irq, void *dev_id)
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{
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struct net_device *dev = dev_id;
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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spin_lock(&self->lock);
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if (SIR_UART_GET_LSR(port) & THRE)
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bfin_sir_tx_chars(dev);
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spin_unlock(&self->lock);
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return IRQ_HANDLED;
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}
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#endif /* CONFIG_SIR_BFIN_PIO */
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#ifdef CONFIG_SIR_BFIN_DMA
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static void bfin_sir_dma_tx_chars(struct net_device *dev)
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{
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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if (!port->tx_done)
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return;
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port->tx_done = 0;
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if (self->tx_buff.len == 0) {
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self->stats.tx_packets++;
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if (self->newspeed) {
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bfin_sir_set_speed(port, self->newspeed);
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self->speed = self->newspeed;
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self->newspeed = 0;
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}
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bfin_sir_enable_rx(port);
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port->tx_done = 1;
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netif_wake_queue(dev);
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return;
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}
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blackfin_dcache_flush_range((unsigned long)(self->tx_buff.data),
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(unsigned long)(self->tx_buff.data+self->tx_buff.len));
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set_dma_config(port->tx_dma_channel,
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set_bfin_dma_config(DIR_READ, DMA_FLOW_STOP,
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INTR_ON_BUF, DIMENSION_LINEAR, DATA_SIZE_8,
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DMA_SYNC_RESTART));
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set_dma_start_addr(port->tx_dma_channel,
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(unsigned long)(self->tx_buff.data));
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set_dma_x_count(port->tx_dma_channel, self->tx_buff.len);
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set_dma_x_modify(port->tx_dma_channel, 1);
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enable_dma(port->tx_dma_channel);
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}
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static irqreturn_t bfin_sir_dma_tx_int(int irq, void *dev_id)
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{
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struct net_device *dev = dev_id;
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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spin_lock(&self->lock);
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if (!(get_dma_curr_irqstat(port->tx_dma_channel) & DMA_RUN)) {
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clear_dma_irqstat(port->tx_dma_channel);
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bfin_sir_stop_tx(port);
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self->stats.tx_packets++;
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self->stats.tx_bytes += self->tx_buff.len;
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self->tx_buff.len = 0;
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if (self->newspeed) {
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bfin_sir_set_speed(port, self->newspeed);
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self->speed = self->newspeed;
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self->newspeed = 0;
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}
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bfin_sir_enable_rx(port);
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/* I'm hungry! */
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netif_wake_queue(dev);
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port->tx_done = 1;
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}
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spin_unlock(&self->lock);
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return IRQ_HANDLED;
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}
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static void bfin_sir_dma_rx_chars(struct net_device *dev)
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{
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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int i;
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SIR_UART_CLEAR_LSR(port);
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for (i = port->rx_dma_buf.head; i < port->rx_dma_buf.tail; i++)
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async_unwrap_char(dev, &self->stats, &self->rx_buff, port->rx_dma_buf.buf[i]);
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}
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void bfin_sir_rx_dma_timeout(struct net_device *dev)
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{
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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int x_pos, pos;
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unsigned long flags;
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spin_lock_irqsave(&self->lock, flags);
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x_pos = DMA_SIR_RX_XCNT - get_dma_curr_xcount(port->rx_dma_channel);
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if (x_pos == DMA_SIR_RX_XCNT)
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x_pos = 0;
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pos = port->rx_dma_nrows * DMA_SIR_RX_XCNT + x_pos;
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if (pos > port->rx_dma_buf.tail) {
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port->rx_dma_buf.tail = pos;
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bfin_sir_dma_rx_chars(dev);
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port->rx_dma_buf.head = port->rx_dma_buf.tail;
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}
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spin_unlock_irqrestore(&self->lock, flags);
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}
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static irqreturn_t bfin_sir_dma_rx_int(int irq, void *dev_id)
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{
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struct net_device *dev = dev_id;
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struct bfin_sir_self *self = netdev_priv(dev);
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struct bfin_sir_port *port = self->sir_port;
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unsigned short irqstat;
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spin_lock(&self->lock);
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port->rx_dma_nrows++;
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port->rx_dma_buf.tail = DMA_SIR_RX_XCNT * port->rx_dma_nrows;
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bfin_sir_dma_rx_chars(dev);
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if (port->rx_dma_nrows >= DMA_SIR_RX_YCNT) {
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port->rx_dma_nrows = 0;
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port->rx_dma_buf.tail = 0;
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}
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port->rx_dma_buf.head = port->rx_dma_buf.tail;
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irqstat = get_dma_curr_irqstat(port->rx_dma_channel);
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clear_dma_irqstat(port->rx_dma_channel);
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spin_unlock(&self->lock);
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mod_timer(&port->rx_dma_timer, jiffies + DMA_SIR_RX_FLUSH_JIFS);
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return IRQ_HANDLED;
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}
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#endif /* CONFIG_SIR_BFIN_DMA */
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static int bfin_sir_startup(struct bfin_sir_port *port, struct net_device *dev)
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{
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#ifdef CONFIG_SIR_BFIN_DMA
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dma_addr_t dma_handle;
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#endif /* CONFIG_SIR_BFIN_DMA */
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if (request_dma(port->rx_dma_channel, "BFIN_UART_RX") < 0) {
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dev_warn(&dev->dev, "Unable to attach SIR RX DMA channel\n");
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return -EBUSY;
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}
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if (request_dma(port->tx_dma_channel, "BFIN_UART_TX") < 0) {
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dev_warn(&dev->dev, "Unable to attach SIR TX DMA channel\n");
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free_dma(port->rx_dma_channel);
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return -EBUSY;
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}
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#ifdef CONFIG_SIR_BFIN_DMA
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set_dma_callback(port->rx_dma_channel, bfin_sir_dma_rx_int, dev);
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set_dma_callback(port->tx_dma_channel, bfin_sir_dma_tx_int, dev);
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port->rx_dma_buf.buf = (unsigned char *)dma_alloc_coherent(NULL, PAGE_SIZE, &dma_handle, GFP_DMA);
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port->rx_dma_buf.head = 0;
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port->rx_dma_buf.tail = 0;
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port->rx_dma_nrows = 0;
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set_dma_config(port->rx_dma_channel,
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set_bfin_dma_config(DIR_WRITE, DMA_FLOW_AUTO,
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INTR_ON_ROW, DIMENSION_2D,
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DATA_SIZE_8, DMA_SYNC_RESTART));
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set_dma_x_count(port->rx_dma_channel, DMA_SIR_RX_XCNT);
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set_dma_x_modify(port->rx_dma_channel, 1);
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set_dma_y_count(port->rx_dma_channel, DMA_SIR_RX_YCNT);
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set_dma_y_modify(port->rx_dma_channel, 1);
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set_dma_start_addr(port->rx_dma_channel, (unsigned long)port->rx_dma_buf.buf);
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enable_dma(port->rx_dma_channel);
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port->rx_dma_timer.data = (unsigned long)(dev);
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port->rx_dma_timer.function = (void *)bfin_sir_rx_dma_timeout;
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#else
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if (request_irq(port->irq, bfin_sir_rx_int, IRQF_DISABLED, "BFIN_SIR_RX", dev)) {
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dev_warn(&dev->dev, "Unable to attach SIR RX interrupt\n");
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return -EBUSY;
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}
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if (request_irq(port->irq+1, bfin_sir_tx_int, IRQF_DISABLED, "BFIN_SIR_TX", dev)) {
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dev_warn(&dev->dev, "Unable to attach SIR TX interrupt\n");
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free_irq(port->irq, dev);
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return -EBUSY;
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}
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#endif
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return 0;
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}
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static void bfin_sir_shutdown(struct bfin_sir_port *port, struct net_device *dev)
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{
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unsigned short val;
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bfin_sir_stop_rx(port);
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SIR_UART_DISABLE_INTS(port);
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val = SIR_UART_GET_GCTL(port);
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val &= ~(UCEN | IREN | RPOLC);
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SIR_UART_PUT_GCTL(port, val);
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#ifdef CONFIG_SIR_BFIN_DMA
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disable_dma(port->tx_dma_channel);
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disable_dma(port->rx_dma_channel);
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del_timer(&(port->rx_dma_timer));
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dma_free_coherent(NULL, PAGE_SIZE, port->rx_dma_buf.buf, 0);
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#else
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free_irq(port->irq+1, dev);
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free_irq(port->irq, dev);
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#endif
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free_dma(port->tx_dma_channel);
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free_dma(port->rx_dma_channel);
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}
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#ifdef CONFIG_PM
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static int bfin_sir_suspend(struct platform_device *pdev, pm_message_t state)
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{
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struct bfin_sir_port *sir_port;
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struct net_device *dev;
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struct bfin_sir_self *self;
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sir_port = platform_get_drvdata(pdev);
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if (!sir_port)
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return 0;
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dev = sir_port->dev;
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self = netdev_priv(dev);
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if (self->open) {
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flush_work(&self->work);
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bfin_sir_shutdown(self->sir_port, dev);
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netif_device_detach(dev);
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}
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return 0;
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}
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static int bfin_sir_resume(struct platform_device *pdev)
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{
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struct bfin_sir_port *sir_port;
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struct net_device *dev;
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struct bfin_sir_self *self;
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struct bfin_sir_port *port;
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sir_port = platform_get_drvdata(pdev);
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if (!sir_port)
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return 0;
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dev = sir_port->dev;
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self = netdev_priv(dev);
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port = self->sir_port;
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if (self->open) {
|
|
if (self->newspeed) {
|
|
self->speed = self->newspeed;
|
|
self->newspeed = 0;
|
|
}
|
|
bfin_sir_startup(port, dev);
|
|
bfin_sir_set_speed(port, 9600);
|
|
bfin_sir_enable_rx(port);
|
|
netif_device_attach(dev);
|
|
}
|
|
return 0;
|
|
}
|
|
#else
|
|
#define bfin_sir_suspend NULL
|
|
#define bfin_sir_resume NULL
|
|
#endif
|
|
|
|
static void bfin_sir_send_work(struct work_struct *work)
|
|
{
|
|
struct bfin_sir_self *self = container_of(work, struct bfin_sir_self, work);
|
|
struct net_device *dev = self->sir_port->dev;
|
|
struct bfin_sir_port *port = self->sir_port;
|
|
unsigned short val;
|
|
int tx_cnt = 10;
|
|
|
|
while (bfin_sir_is_receiving(dev) && --tx_cnt)
|
|
turnaround_delay(dev->last_rx, self->mtt);
|
|
|
|
bfin_sir_stop_rx(port);
|
|
|
|
/* To avoid losting RX interrupt, we reset IR function before
|
|
* sending data. We also can set the speed, which will
|
|
* reset all the UART.
|
|
*/
|
|
val = SIR_UART_GET_GCTL(port);
|
|
val &= ~(IREN | RPOLC);
|
|
SIR_UART_PUT_GCTL(port, val);
|
|
SSYNC();
|
|
val |= IREN | RPOLC;
|
|
SIR_UART_PUT_GCTL(port, val);
|
|
SSYNC();
|
|
/* bfin_sir_set_speed(port, self->speed); */
|
|
|
|
#ifdef CONFIG_SIR_BFIN_DMA
|
|
bfin_sir_dma_tx_chars(dev);
|
|
#endif
|
|
bfin_sir_enable_tx(port);
|
|
dev->trans_start = jiffies;
|
|
}
|
|
|
|
static int bfin_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct bfin_sir_self *self = netdev_priv(dev);
|
|
int speed = irda_get_next_speed(skb);
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
self->mtt = irda_get_mtt(skb);
|
|
|
|
if (speed != self->speed && speed != -1)
|
|
self->newspeed = speed;
|
|
|
|
self->tx_buff.data = self->tx_buff.head;
|
|
if (skb->len == 0)
|
|
self->tx_buff.len = 0;
|
|
else
|
|
self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, self->tx_buff.truesize);
|
|
|
|
schedule_work(&self->work);
|
|
dev_kfree_skb(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_sir_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
|
|
{
|
|
struct if_irda_req *rq = (struct if_irda_req *)ifreq;
|
|
struct bfin_sir_self *self = netdev_priv(dev);
|
|
struct bfin_sir_port *port = self->sir_port;
|
|
int ret = 0;
|
|
|
|
switch (cmd) {
|
|
case SIOCSBANDWIDTH:
|
|
if (capable(CAP_NET_ADMIN)) {
|
|
if (self->open) {
|
|
ret = bfin_sir_set_speed(port, rq->ifr_baudrate);
|
|
bfin_sir_enable_rx(port);
|
|
} else {
|
|
dev_warn(&dev->dev, "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:
|
|
rq->ifr_receiving = bfin_sir_is_receiving(dev);
|
|
break;
|
|
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct net_device_stats *bfin_sir_stats(struct net_device *dev)
|
|
{
|
|
struct bfin_sir_self *self = netdev_priv(dev);
|
|
|
|
return &self->stats;
|
|
}
|
|
|
|
static int bfin_sir_open(struct net_device *dev)
|
|
{
|
|
struct bfin_sir_self *self = netdev_priv(dev);
|
|
struct bfin_sir_port *port = self->sir_port;
|
|
int err = -ENOMEM;
|
|
|
|
self->newspeed = 0;
|
|
self->speed = 9600;
|
|
|
|
spin_lock_init(&self->lock);
|
|
|
|
err = bfin_sir_startup(port, dev);
|
|
if (err)
|
|
goto err_startup;
|
|
|
|
bfin_sir_set_speed(port, 9600);
|
|
|
|
self->irlap = irlap_open(dev, &self->qos, DRIVER_NAME);
|
|
if (!self->irlap)
|
|
goto err_irlap;
|
|
|
|
INIT_WORK(&self->work, bfin_sir_send_work);
|
|
|
|
/*
|
|
* Now enable the interrupt then start the queue
|
|
*/
|
|
self->open = 1;
|
|
bfin_sir_enable_rx(port);
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return 0;
|
|
|
|
err_irlap:
|
|
self->open = 0;
|
|
bfin_sir_shutdown(port, dev);
|
|
err_startup:
|
|
return err;
|
|
}
|
|
|
|
static int bfin_sir_stop(struct net_device *dev)
|
|
{
|
|
struct bfin_sir_self *self = netdev_priv(dev);
|
|
|
|
flush_work(&self->work);
|
|
bfin_sir_shutdown(self->sir_port, dev);
|
|
|
|
if (self->rxskb) {
|
|
dev_kfree_skb(self->rxskb);
|
|
self->rxskb = NULL;
|
|
}
|
|
|
|
/* Stop IrLAP */
|
|
if (self->irlap) {
|
|
irlap_close(self->irlap);
|
|
self->irlap = NULL;
|
|
}
|
|
|
|
netif_stop_queue(dev);
|
|
self->open = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_sir_init_iobuf(iobuff_t *io, int size)
|
|
{
|
|
io->head = kmalloc(size, GFP_KERNEL);
|
|
if (!io->head)
|
|
return -ENOMEM;
|
|
io->truesize = size;
|
|
io->in_frame = FALSE;
|
|
io->state = OUTSIDE_FRAME;
|
|
io->data = io->head;
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit bfin_sir_probe(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev;
|
|
struct bfin_sir_self *self;
|
|
unsigned int baudrate_mask;
|
|
struct bfin_sir_port *sir_port;
|
|
int err;
|
|
|
|
if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(per) && \
|
|
per[pdev->id][3] == pdev->id) {
|
|
err = peripheral_request_list(per[pdev->id], DRIVER_NAME);
|
|
if (err)
|
|
return err;
|
|
} else {
|
|
dev_err(&pdev->dev, "Invalid pdev id, please check board file\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
err = -ENOMEM;
|
|
sir_port = kmalloc(sizeof(*sir_port), GFP_KERNEL);
|
|
if (!sir_port)
|
|
goto err_mem_0;
|
|
|
|
bfin_sir_init_ports(sir_port, pdev);
|
|
|
|
dev = alloc_irdadev(sizeof(*self));
|
|
if (!dev)
|
|
goto err_mem_1;
|
|
|
|
self = netdev_priv(dev);
|
|
self->dev = &pdev->dev;
|
|
self->sir_port = sir_port;
|
|
sir_port->dev = dev;
|
|
|
|
err = bfin_sir_init_iobuf(&self->rx_buff, IRDA_SKB_MAX_MTU);
|
|
if (err)
|
|
goto err_mem_2;
|
|
err = bfin_sir_init_iobuf(&self->tx_buff, IRDA_SIR_MAX_FRAME);
|
|
if (err)
|
|
goto err_mem_3;
|
|
|
|
dev->hard_start_xmit = bfin_sir_hard_xmit;
|
|
dev->open = bfin_sir_open;
|
|
dev->stop = bfin_sir_stop;
|
|
dev->do_ioctl = bfin_sir_ioctl;
|
|
dev->get_stats = bfin_sir_stats;
|
|
dev->irq = sir_port->irq;
|
|
|
|
irda_init_max_qos_capabilies(&self->qos);
|
|
|
|
baudrate_mask = IR_9600;
|
|
|
|
switch (max_rate) {
|
|
case 115200:
|
|
baudrate_mask |= IR_115200;
|
|
case 57600:
|
|
baudrate_mask |= IR_57600;
|
|
case 38400:
|
|
baudrate_mask |= IR_38400;
|
|
case 19200:
|
|
baudrate_mask |= IR_19200;
|
|
case 9600:
|
|
break;
|
|
default:
|
|
dev_warn(&pdev->dev, "Invalid maximum baud rate, using 9600\n");
|
|
}
|
|
|
|
self->qos.baud_rate.bits &= baudrate_mask;
|
|
|
|
self->qos.min_turn_time.bits = 1; /* 10 ms or more */
|
|
|
|
irda_qos_bits_to_value(&self->qos);
|
|
|
|
err = register_netdev(dev);
|
|
|
|
if (err) {
|
|
kfree(self->tx_buff.head);
|
|
err_mem_3:
|
|
kfree(self->rx_buff.head);
|
|
err_mem_2:
|
|
free_netdev(dev);
|
|
err_mem_1:
|
|
kfree(sir_port);
|
|
err_mem_0:
|
|
peripheral_free_list(per[pdev->id]);
|
|
} else
|
|
platform_set_drvdata(pdev, sir_port);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __devexit bfin_sir_remove(struct platform_device *pdev)
|
|
{
|
|
struct bfin_sir_port *sir_port;
|
|
struct net_device *dev = NULL;
|
|
struct bfin_sir_self *self;
|
|
|
|
sir_port = platform_get_drvdata(pdev);
|
|
if (!sir_port)
|
|
return 0;
|
|
dev = sir_port->dev;
|
|
self = netdev_priv(dev);
|
|
unregister_netdev(dev);
|
|
kfree(self->tx_buff.head);
|
|
kfree(self->rx_buff.head);
|
|
free_netdev(dev);
|
|
kfree(sir_port);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver bfin_ir_driver = {
|
|
.probe = bfin_sir_probe,
|
|
.remove = __devexit_p(bfin_sir_remove),
|
|
.suspend = bfin_sir_suspend,
|
|
.resume = bfin_sir_resume,
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
},
|
|
};
|
|
|
|
static int __init bfin_sir_init(void)
|
|
{
|
|
return platform_driver_register(&bfin_ir_driver);
|
|
}
|
|
|
|
static void __exit bfin_sir_exit(void)
|
|
{
|
|
platform_driver_unregister(&bfin_ir_driver);
|
|
}
|
|
|
|
module_init(bfin_sir_init);
|
|
module_exit(bfin_sir_exit);
|
|
|
|
module_param(max_rate, int, 0);
|
|
MODULE_PARM_DESC(max_rate, "Maximum baud rate (115200, 57600, 38400, 19200, 9600)");
|
|
|
|
MODULE_AUTHOR("Graf Yang <graf.yang@analog.com>");
|
|
MODULE_DESCRIPTION("Blackfin IrDA driver");
|
|
MODULE_LICENSE("GPL");
|