diff options
| -rw-r--r-- | drivers/net/irda/pxaficp_ir.c | 210 |
1 files changed, 126 insertions, 84 deletions
diff --git a/drivers/net/irda/pxaficp_ir.c b/drivers/net/irda/pxaficp_ir.c index 6a81d3d1b312..05a668216a0f 100644 --- a/drivers/net/irda/pxaficp_ir.c +++ b/drivers/net/irda/pxaficp_ir.c @@ -29,15 +29,16 @@ #include <mach/dma.h> #include <linux/platform_data/irda-pxaficp.h> +#undef __REG +#define __REG(x) ((x) & 0xffff) #include <mach/regs-uart.h> -#define FICP __REG(0x40800000) /* Start of FICP area */ -#define ICCR0 __REG(0x40800000) /* ICP Control Register 0 */ -#define ICCR1 __REG(0x40800004) /* ICP Control Register 1 */ -#define ICCR2 __REG(0x40800008) /* ICP Control Register 2 */ -#define ICDR __REG(0x4080000c) /* ICP Data Register */ -#define ICSR0 __REG(0x40800014) /* ICP Status Register 0 */ -#define ICSR1 __REG(0x40800018) /* ICP Status Register 1 */ +#define ICCR0 0x0000 /* ICP Control Register 0 */ +#define ICCR1 0x0004 /* ICP Control Register 1 */ +#define ICCR2 0x0008 /* ICP Control Register 2 */ +#define ICDR 0x000c /* ICP Data Register */ +#define ICSR0 0x0014 /* ICP Status Register 0 */ +#define ICSR1 0x0018 /* ICP Status Register 1 */ #define ICCR0_AME (1 << 7) /* Address match enable */ #define ICCR0_TIE (1 << 6) /* Transmit FIFO interrupt enable */ @@ -55,9 +56,7 @@ #define ICCR2_TRIG_16 (1 << 0) /* >= 16 bytes */ #define ICCR2_TRIG_32 (2 << 0) /* >= 32 bytes */ -#ifdef CONFIG_PXA27x #define ICSR0_EOC (1 << 6) /* DMA End of Descriptor Chain */ -#endif #define ICSR0_FRE (1 << 5) /* Framing error */ #define ICSR0_RFS (1 << 4) /* Receive FIFO service request */ #define ICSR0_TFS (1 << 3) /* Transnit FIFO service request */ @@ -98,11 +97,50 @@ IrSR_RCVEIR_UART_MODE | \ IrSR_XMITIR_IR_MODE) +/* macros for registers read/write */ +#define ficp_writel(irda, val, off) \ + do { \ + dev_vdbg(irda->dev, \ + "%s():%d ficp_writel(0x%x, %s)\n", \ + __func__, __LINE__, (val), #off); \ + writel_relaxed((val), (irda)->irda_base + (off)); \ + } while (0) + +#define ficp_readl(irda, off) \ + ({ \ + unsigned int _v; \ + _v = readl_relaxed((irda)->irda_base + (off)); \ + dev_vdbg(irda->dev, \ + "%s():%d ficp_readl(%s): 0x%x\n", \ + __func__, __LINE__, #off, _v); \ + _v; \ + }) + +#define stuart_writel(irda, val, off) \ + do { \ + dev_vdbg(irda->dev, \ + "%s():%d stuart_writel(0x%x, %s)\n", \ + __func__, __LINE__, (val), #off); \ + writel_relaxed((val), (irda)->stuart_base + (off)); \ + } while (0) + +#define stuart_readl(irda, off) \ + ({ \ + unsigned int _v; \ + _v = readl_relaxed((irda)->stuart_base + (off)); \ + dev_vdbg(irda->dev, \ + "%s():%d stuart_readl(%s): 0x%x\n", \ + __func__, __LINE__, #off, _v); \ + _v; \ + }) + struct pxa_irda { int speed; int newspeed; unsigned long long last_clk; + void __iomem *stuart_base; + void __iomem *irda_base; unsigned char *dma_rx_buff; unsigned char *dma_tx_buff; dma_addr_t dma_rx_buff_phy; @@ -153,7 +191,7 @@ static inline void pxa_irda_enable_sirclk(struct pxa_irda *si) inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si) { DCSR(si->rxdma) = DCSR_NODESC; - DSADR(si->rxdma) = __PREG(ICDR); + DSADR(si->rxdma) = (unsigned long)si->irda_base + 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; @@ -163,7 +201,7 @@ 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); + DTADR(si->txdma) = (unsigned long)si->irda_base + ICDR; DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len; DCSR(si->txdma) |= DCSR_RUN; } @@ -206,7 +244,7 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed) /* stop RX DMA */ DCSR(si->rxdma) &= ~DCSR_RUN; /* disable FICP */ - ICCR0 = 0; + ficp_writel(si, 0, ICCR0); pxa_irda_disable_clk(si); /* set board transceiver to SIR mode */ @@ -217,17 +255,19 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed) } /* disable STUART first */ - STIER = 0; + stuart_writel(si, 0, STIER); /* access DLL & DLH */ - STLCR |= LCR_DLAB; - STDLL = divisor & 0xff; - STDLH = divisor >> 8; - STLCR &= ~LCR_DLAB; + stuart_writel(si, stuart_readl(si, STLCR) | LCR_DLAB, STLCR); + stuart_writel(si, divisor & 0xff, STDLL); + stuart_writel(si, divisor >> 8, STDLH); + stuart_writel(si, stuart_readl(si, STLCR) & ~LCR_DLAB, STLCR); si->speed = speed; - STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6; - STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE; + stuart_writel(si, IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6, + STISR); + stuart_writel(si, IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE, + STIER); local_irq_restore(flags); break; @@ -236,12 +276,12 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed) local_irq_save(flags); /* disable STUART */ - STIER = 0; - STISR = 0; + stuart_writel(si, 0, STIER); + stuart_writel(si, 0, STISR); pxa_irda_disable_clk(si); /* disable FICP first */ - ICCR0 = 0; + ficp_writel(si, 0, ICCR0); /* set board transceiver to FIR mode */ pxa_irda_set_mode(si, IR_FIRMODE); @@ -251,7 +291,7 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed) si->speed = speed; pxa_irda_fir_dma_rx_start(si); - ICCR0 = ICCR0_ITR | ICCR0_RXE; + ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0); local_irq_restore(flags); break; @@ -270,13 +310,13 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id) struct pxa_irda *si = netdev_priv(dev); int iir, lsr, data; - iir = STIIR; + iir = stuart_readl(si, STIIR); switch (iir & 0x0F) { case 0x06: /* Receiver Line Status */ - lsr = STLSR; + lsr = stuart_readl(si, STLSR); while (lsr & LSR_FIFOE) { - data = STRBR; + data = stuart_readl(si, STRBR); if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) { printk(KERN_DEBUG "pxa_ir: sir receiving error\n"); dev->stats.rx_errors++; @@ -289,7 +329,7 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id) async_unwrap_char(dev, &dev->stats, &si->rx_buff, data); } - lsr = STLSR; + lsr = stuart_readl(si, STLSR); } si->last_clk = sched_clock(); break; @@ -300,14 +340,16 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id) case 0x0C: /* Character Timeout Indication */ do { dev->stats.rx_bytes++; - async_unwrap_char(dev, &dev->stats, &si->rx_buff, STRBR); - } while (STLSR & LSR_DR); + async_unwrap_char(dev, &dev->stats, &si->rx_buff, + stuart_readl(si, STRBR)); + } while (stuart_readl(si, STLSR) & LSR_DR); si->last_clk = sched_clock(); break; case 0x02: /* Transmit FIFO Data Request */ - while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) { - STTHR = *si->tx_buff.data++; + while ((si->tx_buff.len) && + (stuart_readl(si, STLSR) & LSR_TDRQ)) { + stuart_writel(si, *si->tx_buff.data++, STTHR); si->tx_buff.len -= 1; } @@ -316,7 +358,7 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id) dev->stats.tx_bytes += si->tx_buff.data - si->tx_buff.head; /* We need to ensure that the transmitter has finished. */ - while ((STLSR & LSR_TEMT) == 0) + while ((stuart_readl(si, STLSR) & LSR_TEMT) == 0) cpu_relax(); si->last_clk = sched_clock(); @@ -330,9 +372,11 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id) si->newspeed = 0; } else { /* enable IR Receiver, disable IR Transmitter */ - STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6; + stuart_writel(si, IrSR_IR_RECEIVE_ON | + IrSR_XMODE_PULSE_1_6, STISR); /* enable STUART and receive interrupts */ - STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE; + stuart_writel(si, IER_UUE | IER_RLSE | + IER_RAVIE | IER_RTIOE, STIER); } /* I'm hungry! */ netif_wake_queue(dev); @@ -370,7 +414,7 @@ static void pxa_irda_fir_dma_tx_irq(int channel, void *data) dev->stats.tx_errors++; } - while (ICSR1 & ICSR1_TBY) + while (ficp_readl(si, ICSR1) & ICSR1_TBY) cpu_relax(); si->last_clk = sched_clock(); @@ -386,11 +430,11 @@ static void pxa_irda_fir_dma_tx_irq(int channel, void *data) } else { int i = 64; - ICCR0 = 0; + ficp_writel(si, 0, ICCR0); pxa_irda_fir_dma_rx_start(si); - while ((ICSR1 & ICSR1_RNE) && i--) - (void)ICDR; - ICCR0 = ICCR0_ITR | ICCR0_RXE; + while ((ficp_readl(si, ICSR1) & ICSR1_RNE) && i--) + ficp_readl(si, ICDR); + ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0); if (i < 0) printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n"); @@ -408,9 +452,9 @@ static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, in do { /* Read Status, and then Data. */ - stat = ICSR1; + stat = ficp_readl(si, ICSR1); rmb(); - data = ICDR; + data = ficp_readl(si, ICDR); if (stat & (ICSR1_CRE | ICSR1_ROR)) { dev->stats.rx_errors++; @@ -428,7 +472,7 @@ static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, in /* If we hit the end of frame, there's no point in continuing. */ if (stat & ICSR1_EOF) break; - } while (ICSR0 & ICSR0_EIF); + } while (ficp_readl(si, ICSR0) & ICSR0_EIF); if (stat & ICSR1_EOF) { /* end of frame. */ @@ -472,8 +516,8 @@ static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id) /* stop RX DMA */ DCSR(si->rxdma) &= ~DCSR_RUN; - icsr0 = ICSR0; si->last_clk = sched_clock(); + icsr0 = ficp_readl(si, ICSR0); if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) { if (icsr0 & ICSR0_FRE) { @@ -483,7 +527,7 @@ static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id) printk(KERN_DEBUG "pxa_ir: fir receive abort\n"); dev->stats.rx_errors++; } - ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB); + ficp_writel(si, icsr0 & (ICSR0_FRE | ICSR0_RAB), ICSR0); } if (icsr0 & ICSR0_EIF) { @@ -491,11 +535,11 @@ static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id) pxa_irda_fir_irq_eif(si, dev, icsr0); } - ICCR0 = 0; + ficp_writel(si, 0, ICCR0); pxa_irda_fir_dma_rx_start(si); - while ((ICSR1 & ICSR1_RNE) && i--) - (void)ICDR; - ICCR0 = ICCR0_ITR | ICCR0_RXE; + while ((ficp_readl(si, ICSR1) & ICSR1_RNE) && i--) + ficp_readl(si, ICDR); + ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0); if (i < 0) printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n"); @@ -536,11 +580,12 @@ static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev) 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; + stuart_writel(si, 0, STIER); + stuart_writel(si, IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6, + STISR); /* enable STUART and transmit interrupts */ - STIER = IER_UUE | IER_TIE; + stuart_writel(si, IER_UUE | IER_TIE, STIER); } else { unsigned long mtt = irda_get_mtt(skb); @@ -553,10 +598,10 @@ static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev) /* stop RX DMA, disable FICP */ DCSR(si->rxdma) &= ~DCSR_RUN; - ICCR0 = 0; + ficp_writel(si, 0, ICCR0); pxa_irda_fir_dma_tx_start(si); - ICCR0 = ICCR0_ITR | ICCR0_TXE; + ficp_writel(si, ICCR0_ITR | ICCR0_TXE, ICCR0); } dev_kfree_skb(skb); @@ -612,18 +657,18 @@ static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd) static void pxa_irda_startup(struct pxa_irda *si) { /* Disable STUART interrupts */ - STIER = 0; + stuart_writel(si, 0, STIER); /* enable STUART interrupt to the processor */ - STMCR = MCR_OUT2; + stuart_writel(si, MCR_OUT2, STMCR); /* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */ - STLCR = LCR_WLS0 | LCR_WLS1; + stuart_writel(si, LCR_WLS0 | LCR_WLS1, STLCR); /* enable FIFO, we use FIFO to improve performance */ - STFCR = FCR_TRFIFOE | FCR_ITL_32; + stuart_writel(si, FCR_TRFIFOE | FCR_ITL_32, STFCR); /* disable FICP */ - ICCR0 = 0; + ficp_writel(si, 0, ICCR0); /* configure FICP ICCR2 */ - ICCR2 = ICCR2_TXP | ICCR2_TRIG_32; + ficp_writel(si, ICCR2_TXP | ICCR2_TRIG_32, ICCR2); /* configure DMAC */ DRCMR(17) = si->rxdma | DRCMR_MAPVLD; @@ -643,15 +688,15 @@ static void pxa_irda_shutdown(struct pxa_irda *si) local_irq_save(flags); /* disable STUART and interrupt */ - STIER = 0; + stuart_writel(si, 0, STIER); /* disable STUART SIR mode */ - STISR = 0; + stuart_writel(si, 0, STISR); /* disable DMA */ DCSR(si->txdma) &= ~DCSR_RUN; DCSR(si->rxdma) &= ~DCSR_RUN; /* disable FICP */ - ICCR0 = 0; + ficp_writel(si, 0, ICCR0); /* disable the STUART or FICP clocks */ pxa_irda_disable_clk(si); @@ -829,25 +874,33 @@ static const struct net_device_ops pxa_irda_netdev_ops = { static int pxa_irda_probe(struct platform_device *pdev) { struct net_device *dev; + struct resource *res; struct pxa_irda *si; + void __iomem *ficp, *stuart; unsigned int baudrate_mask; int err; if (!pdev->dev.platform_data) return -ENODEV; - err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY; - if (err) - goto err_mem_1; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ficp = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ficp)) { + dev_err(&pdev->dev, "resource ficp not defined\n"); + return PTR_ERR(ficp); + } - err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY; - if (err) - goto err_mem_2; + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + stuart = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(stuart)) { + dev_err(&pdev->dev, "resource stuart not defined\n"); + return PTR_ERR(stuart); + } dev = alloc_irdadev(sizeof(struct pxa_irda)); if (!dev) { err = -ENOMEM; - goto err_mem_3; + goto err_mem_1; } SET_NETDEV_DEV(dev, &pdev->dev); @@ -855,11 +908,13 @@ static int pxa_irda_probe(struct platform_device *pdev) si->dev = &pdev->dev; si->pdata = pdev->dev.platform_data; + si->irda_base = ficp; + si->stuart_base = stuart; si->uart_irq = platform_get_irq(pdev, 0); si->icp_irq = platform_get_irq(pdev, 1); - si->sir_clk = clk_get(&pdev->dev, "UARTCLK"); - si->fir_clk = clk_get(&pdev->dev, "FICPCLK"); + si->sir_clk = devm_clk_get(&pdev->dev, "UARTCLK"); + si->fir_clk = devm_clk_get(&pdev->dev, "FICPCLK"); if (IS_ERR(si->sir_clk) || IS_ERR(si->fir_clk)) { err = PTR_ERR(IS_ERR(si->sir_clk) ? si->sir_clk : si->fir_clk); goto err_mem_4; @@ -924,15 +979,7 @@ err_startup: err_mem_5: kfree(si->rx_buff.head); err_mem_4: - if (si->sir_clk && !IS_ERR(si->sir_clk)) - clk_put(si->sir_clk); - if (si->fir_clk && !IS_ERR(si->fir_clk)) - clk_put(si->fir_clk); free_netdev(dev); -err_mem_3: - release_mem_region(__PREG(FICP), 0x1c); -err_mem_2: - release_mem_region(__PREG(STUART), 0x24); } err_mem_1: return err; @@ -951,14 +998,9 @@ static int pxa_irda_remove(struct platform_device *_dev) si->pdata->shutdown(si->dev); kfree(si->tx_buff.head); kfree(si->rx_buff.head); - clk_put(si->fir_clk); - clk_put(si->sir_clk); free_netdev(dev); } - release_mem_region(__PREG(STUART), 0x24); - release_mem_region(__PREG(FICP), 0x1c); - return 0; } |
