174 static int pxa_irda_set_speed(struct pxa_irda *si, int speed);
176 static inline void pxa_irda_disable_clk(struct pxa_irda *si)  in pxa_irda_disable_clk()  argument
178 	if (si->cur_clk)  in pxa_irda_disable_clk()
179 		clk_disable_unprepare(si->cur_clk);  in pxa_irda_disable_clk()
180 	si->cur_clk = NULL;  in pxa_irda_disable_clk()
183 static inline void pxa_irda_enable_firclk(struct pxa_irda *si)  in pxa_irda_enable_firclk()  argument
185 	si->cur_clk = si->fir_clk;  in pxa_irda_enable_firclk()
186 	clk_prepare_enable(si->fir_clk);  in pxa_irda_enable_firclk()
189 static inline void pxa_irda_enable_sirclk(struct pxa_irda *si)  in pxa_irda_enable_sirclk()  argument
191 	si->cur_clk = si->sir_clk;  in pxa_irda_enable_sirclk()
192 	clk_prepare_enable(si->sir_clk);  in pxa_irda_enable_sirclk()
196 #define IS_FIR(si)		((si)->speed >= 4000000)  argument
202 inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si)  in pxa_irda_fir_dma_rx_start()  argument
206 	tx = dmaengine_prep_slave_single(si->rxdma, si->dma_rx_buff_phy,  in pxa_irda_fir_dma_rx_start()
210 		dev_err(si->dev, "prep_slave_sg() failed\n");  in pxa_irda_fir_dma_rx_start()
214 	tx->callback_param = si;  in pxa_irda_fir_dma_rx_start()
215 	si->rx_cookie = dmaengine_submit(tx);  in pxa_irda_fir_dma_rx_start()
216 	dma_async_issue_pending(si->rxdma);  in pxa_irda_fir_dma_rx_start()
219 inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si)  in pxa_irda_fir_dma_tx_start()  argument
223 	tx = dmaengine_prep_slave_single(si->txdma, si->dma_tx_buff_phy,  in pxa_irda_fir_dma_tx_start()
224 					 si->dma_tx_buff_len, DMA_TO_DEVICE,  in pxa_irda_fir_dma_tx_start()
227 		dev_err(si->dev, "prep_slave_sg() failed\n");  in pxa_irda_fir_dma_tx_start()
231 	tx->callback_param = si;  in pxa_irda_fir_dma_tx_start()
232 	si->tx_cookie = dmaengine_submit(tx);  in pxa_irda_fir_dma_tx_start()
233 	dma_async_issue_pending(si->rxdma);  in pxa_irda_fir_dma_tx_start()
239 static void pxa_irda_set_mode(struct pxa_irda *si, int mode)  in pxa_irda_set_mode()  argument
241 	if (si->pdata->transceiver_mode)  in pxa_irda_set_mode()
242 		si->pdata->transceiver_mode(si->dev, mode);  in pxa_irda_set_mode()
244 		if (gpio_is_valid(si->pdata->gpio_pwdown))  in pxa_irda_set_mode()
245 			gpio_set_value(si->pdata->gpio_pwdown,  in pxa_irda_set_mode()
247 					!si->pdata->gpio_pwdown_inverted);  in pxa_irda_set_mode()
248 		pxa2xx_transceiver_mode(si->dev, mode);  in pxa_irda_set_mode()
255 static int pxa_irda_set_speed(struct pxa_irda *si, int speed)  in pxa_irda_set_speed()  argument
270 		if (IS_FIR(si)) {  in pxa_irda_set_speed()
272 			dmaengine_terminate_all(si->rxdma);  in pxa_irda_set_speed()
274 			ficp_writel(si, 0, ICCR0);  in pxa_irda_set_speed()
275 			pxa_irda_disable_clk(si);  in pxa_irda_set_speed()
278 			pxa_irda_set_mode(si, IR_SIRMODE);  in pxa_irda_set_speed()
281 			pxa_irda_enable_sirclk(si);  in pxa_irda_set_speed()
285 		stuart_writel(si, 0, STIER);  in pxa_irda_set_speed()
288 		stuart_writel(si, stuart_readl(si, STLCR) | LCR_DLAB, STLCR);  in pxa_irda_set_speed()
289 		stuart_writel(si, divisor & 0xff, STDLL);  in pxa_irda_set_speed()
290 		stuart_writel(si, divisor >> 8, STDLH);  in pxa_irda_set_speed()
291 		stuart_writel(si, stuart_readl(si, STLCR) & ~LCR_DLAB, STLCR);  in pxa_irda_set_speed()
293 		si->speed = speed;  in pxa_irda_set_speed()
294 		stuart_writel(si, IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6,  in pxa_irda_set_speed()
296 		stuart_writel(si, IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE,  in pxa_irda_set_speed()
306 		stuart_writel(si, 0, STIER);  in pxa_irda_set_speed()
307 		stuart_writel(si, 0, STISR);  in pxa_irda_set_speed()
308 		pxa_irda_disable_clk(si);  in pxa_irda_set_speed()
311 		ficp_writel(si, 0, ICCR0);  in pxa_irda_set_speed()
314 		pxa_irda_set_mode(si, IR_FIRMODE);  in pxa_irda_set_speed()
317 		pxa_irda_enable_firclk(si);  in pxa_irda_set_speed()
319 		si->speed = speed;  in pxa_irda_set_speed()
320 		pxa_irda_fir_dma_rx_start(si);  in pxa_irda_set_speed()
321 		ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);  in pxa_irda_set_speed()
337 	struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_sir_irq()  local
340 	iir = stuart_readl(si, STIIR);  in pxa_irda_sir_irq()
344 		lsr = stuart_readl(si, STLSR);  in pxa_irda_sir_irq()
346 			data = stuart_readl(si, STRBR);  in pxa_irda_sir_irq()
357 						  &si->rx_buff, data);  in pxa_irda_sir_irq()
359 			lsr = stuart_readl(si, STLSR);  in pxa_irda_sir_irq()
361 		si->last_clk = sched_clock();  in pxa_irda_sir_irq()
370 		    async_unwrap_char(dev, &dev->stats, &si->rx_buff,  in pxa_irda_sir_irq()
371 				      stuart_readl(si, STRBR));  in pxa_irda_sir_irq()
372 		} while (stuart_readl(si, STLSR) & LSR_DR);  in pxa_irda_sir_irq()
373 		si->last_clk = sched_clock();  in pxa_irda_sir_irq()
377 		while ((si->tx_buff.len) &&  in pxa_irda_sir_irq()
378 		       (stuart_readl(si, STLSR) & LSR_TDRQ)) {  in pxa_irda_sir_irq()
379 			stuart_writel(si, *si->tx_buff.data++, STTHR);  in pxa_irda_sir_irq()
380 			si->tx_buff.len -= 1;  in pxa_irda_sir_irq()
383 		if (si->tx_buff.len == 0) {  in pxa_irda_sir_irq()
385 			dev->stats.tx_bytes += si->tx_buff.data - si->tx_buff.head;  in pxa_irda_sir_irq()
388 			while ((stuart_readl(si, STLSR) & LSR_TEMT) == 0)  in pxa_irda_sir_irq()
390 			si->last_clk = sched_clock();  in pxa_irda_sir_irq()
397 			if (si->newspeed) {  in pxa_irda_sir_irq()
398 				pxa_irda_set_speed(si, si->newspeed);  in pxa_irda_sir_irq()
399 				si->newspeed = 0;  in pxa_irda_sir_irq()
402 				stuart_writel(si, IrSR_IR_RECEIVE_ON |  in pxa_irda_sir_irq()
405 				stuart_writel(si, IER_UUE | IER_RLSE |  in pxa_irda_sir_irq()
421 	struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_fir_dma_rx_irq()  local
423 	dmaengine_terminate_all(si->rxdma);  in pxa_irda_fir_dma_rx_irq()
431 	struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_fir_dma_tx_irq()  local
433 	dmaengine_terminate_all(si->txdma);  in pxa_irda_fir_dma_tx_irq()
434 	if (dmaengine_tx_status(si->txdma, si->tx_cookie, NULL) == DMA_ERROR) {  in pxa_irda_fir_dma_tx_irq()
438 		dev->stats.tx_bytes += si->dma_tx_buff_len;  in pxa_irda_fir_dma_tx_irq()
441 	while (ficp_readl(si, ICSR1) & ICSR1_TBY)  in pxa_irda_fir_dma_tx_irq()
443 	si->last_clk = sched_clock();  in pxa_irda_fir_dma_tx_irq()
451 	if (si->newspeed) {  in pxa_irda_fir_dma_tx_irq()
452 		pxa_irda_set_speed(si, si->newspeed);  in pxa_irda_fir_dma_tx_irq()
453 		si->newspeed = 0;  in pxa_irda_fir_dma_tx_irq()
457 		ficp_writel(si, 0, ICCR0);  in pxa_irda_fir_dma_tx_irq()
458 		pxa_irda_fir_dma_rx_start(si);  in pxa_irda_fir_dma_tx_irq()
459 		while ((ficp_readl(si, ICSR1) & ICSR1_RNE) && i--)  in pxa_irda_fir_dma_tx_irq()
460 			ficp_readl(si, ICDR);  in pxa_irda_fir_dma_tx_irq()
461 		ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);  in pxa_irda_fir_dma_tx_irq()
470 static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, int icsr0)  in pxa_irda_fir_irq_eif()  argument
477 	dmaengine_tx_status(si->rxdma, si->rx_cookie, &state);  in pxa_irda_fir_irq_eif()
482 		stat = ficp_readl(si, ICSR1);  in pxa_irda_fir_irq_eif()
484 		data = ficp_readl(si, ICDR);  in pxa_irda_fir_irq_eif()
497 			si->dma_rx_buff[len++] = data;  in pxa_irda_fir_irq_eif()
502 	} while (ficp_readl(si, ICSR0) & ICSR0_EIF);  in pxa_irda_fir_irq_eif()
523 		skb_copy_to_linear_data(skb, si->dma_rx_buff, len);  in pxa_irda_fir_irq_eif()
541 	struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_fir_irq()  local
545 	dmaengine_terminate_all(si->rxdma);  in pxa_irda_fir_irq()
546 	si->last_clk = sched_clock();  in pxa_irda_fir_irq()
547 	icsr0 = ficp_readl(si, ICSR0);  in pxa_irda_fir_irq()
557 		ficp_writel(si, icsr0 & (ICSR0_FRE | ICSR0_RAB), ICSR0);  in pxa_irda_fir_irq()
562 		pxa_irda_fir_irq_eif(si, dev, icsr0);  in pxa_irda_fir_irq()
565 	ficp_writel(si, 0, ICCR0);  in pxa_irda_fir_irq()
566 	pxa_irda_fir_dma_rx_start(si);  in pxa_irda_fir_irq()
567 	while ((ficp_readl(si, ICSR1) & ICSR1_RNE) && i--)  in pxa_irda_fir_irq()
568 		ficp_readl(si, ICDR);  in pxa_irda_fir_irq()
569 	ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);  in pxa_irda_fir_irq()
580 	struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_hard_xmit()  local
588 	if (speed != si->speed && speed != -1)  in pxa_irda_hard_xmit()
589 		si->newspeed = speed;  in pxa_irda_hard_xmit()
595 		if (si->newspeed) {  in pxa_irda_hard_xmit()
596 			si->newspeed = 0;  in pxa_irda_hard_xmit()
597 			pxa_irda_set_speed(si, speed);  in pxa_irda_hard_xmit()
605 	if (!IS_FIR(si)) {  in pxa_irda_hard_xmit()
606 		si->tx_buff.data = si->tx_buff.head;  in pxa_irda_hard_xmit()
607 		si->tx_buff.len  = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize);  in pxa_irda_hard_xmit()
610 		stuart_writel(si, 0, STIER);  in pxa_irda_hard_xmit()
611 		stuart_writel(si, IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6,  in pxa_irda_hard_xmit()
615 		stuart_writel(si, IER_UUE | IER_TIE, STIER);  in pxa_irda_hard_xmit()
619 		si->dma_tx_buff_len = skb->len;  in pxa_irda_hard_xmit()
620 		skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len);  in pxa_irda_hard_xmit()
623 			while ((sched_clock() - si->last_clk) * 1000 < mtt)  in pxa_irda_hard_xmit()
627 		dmaengine_terminate_all(si->rxdma);  in pxa_irda_hard_xmit()
628 		ficp_writel(si, 0, ICCR0);  in pxa_irda_hard_xmit()
630 		pxa_irda_fir_dma_tx_start(si);  in pxa_irda_hard_xmit()
631 		ficp_writel(si, ICCR0_ITR | ICCR0_TXE, ICCR0);  in pxa_irda_hard_xmit()
641 	struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_ioctl()  local
653 				ret = pxa_irda_set_speed(si,  in pxa_irda_ioctl()
672 		rq->ifr_receiving = IS_FIR(si) ? 0  in pxa_irda_ioctl()
673 					: si->rx_buff.state != OUTSIDE_FRAME;  in pxa_irda_ioctl()
684 static void pxa_irda_startup(struct pxa_irda *si)  in pxa_irda_startup()  argument
687 	stuart_writel(si, 0, STIER);  in pxa_irda_startup()
689 	stuart_writel(si, MCR_OUT2, STMCR);  in pxa_irda_startup()
691 	stuart_writel(si, LCR_WLS0 | LCR_WLS1, STLCR);  in pxa_irda_startup()
693 	stuart_writel(si, FCR_TRFIFOE | FCR_ITL_32, STFCR);  in pxa_irda_startup()
696 	ficp_writel(si, 0, ICCR0);  in pxa_irda_startup()
698 	ficp_writel(si, ICCR2_TXP | ICCR2_TRIG_32, ICCR2);  in pxa_irda_startup()
701 	si->speed = 4000000;  in pxa_irda_startup()
702 	pxa_irda_set_speed(si, 9600);  in pxa_irda_startup()
707 static void pxa_irda_shutdown(struct pxa_irda *si)  in pxa_irda_shutdown()  argument
714 	stuart_writel(si, 0, STIER);  in pxa_irda_shutdown()
716 	stuart_writel(si, 0, STISR);  in pxa_irda_shutdown()
719 	dmaengine_terminate_all(si->rxdma);  in pxa_irda_shutdown()
720 	dmaengine_terminate_all(si->txdma);  in pxa_irda_shutdown()
722 	ficp_writel(si, 0, ICCR0);  in pxa_irda_shutdown()
725 	pxa_irda_disable_clk(si);  in pxa_irda_shutdown()
730 	pxa_irda_set_mode(si, IR_OFF);  in pxa_irda_shutdown()
737 	struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_start()  local
743 	si->speed = 9600;  in pxa_irda_start()
745 	err = request_irq(si->uart_irq, pxa_irda_sir_irq, 0, dev->name, dev);  in pxa_irda_start()
749 	err = request_irq(si->icp_irq, pxa_irda_fir_irq, 0, dev->name, dev);  in pxa_irda_start()
756 	disable_irq(si->uart_irq);  in pxa_irda_start()
757 	disable_irq(si->icp_irq);  in pxa_irda_start()
767 	config.src_addr = (dma_addr_t)si->irda_base + ICDR;  in pxa_irda_start()
768 	config.dst_addr = (dma_addr_t)si->irda_base + ICDR;  in pxa_irda_start()
772 	param.drcmr = si->drcmr_rx;  in pxa_irda_start()
773 	si->rxdma = dma_request_slave_channel_compat(mask, pxad_filter_fn,  in pxa_irda_start()
775 	if (!si->rxdma)  in pxa_irda_start()
778 	param.drcmr = si->drcmr_tx;  in pxa_irda_start()
779 	si->txdma = dma_request_slave_channel_compat(mask, pxad_filter_fn,  in pxa_irda_start()
781 	if (!si->txdma)  in pxa_irda_start()
784 	err = dmaengine_slave_config(si->rxdma, &config);  in pxa_irda_start()
787 	err = dmaengine_slave_config(si->txdma, &config);  in pxa_irda_start()
792 	si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,  in pxa_irda_start()
793 					     &si->dma_rx_buff_phy, GFP_KERNEL);  in pxa_irda_start()
794 	if (!si->dma_rx_buff)  in pxa_irda_start()
797 	si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,  in pxa_irda_start()
798 					     &si->dma_tx_buff_phy, GFP_KERNEL);  in pxa_irda_start()
799 	if (!si->dma_tx_buff)  in pxa_irda_start()
803 	pxa_irda_startup(si);  in pxa_irda_start()
808 	si->irlap = irlap_open(dev, &si->qos, "pxa");  in pxa_irda_start()
810 	if (!si->irlap)  in pxa_irda_start()
816 	enable_irq(si->uart_irq);  in pxa_irda_start()
817 	enable_irq(si->icp_irq);  in pxa_irda_start()
825 	pxa_irda_shutdown(si);  in pxa_irda_start()
826 	dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);  in pxa_irda_start()
828 	dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);  in pxa_irda_start()
830 	dma_release_channel(si->txdma);  in pxa_irda_start()
832 	dma_release_channel(si->rxdma);  in pxa_irda_start()
834 	free_irq(si->icp_irq, dev);  in pxa_irda_start()
836 	free_irq(si->uart_irq, dev);  in pxa_irda_start()
844 	struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_stop()  local
848 	pxa_irda_shutdown(si);  in pxa_irda_stop()
851 	if (si->irlap) {  in pxa_irda_stop()
852 		irlap_close(si->irlap);  in pxa_irda_stop()
853 		si->irlap = NULL;  in pxa_irda_stop()
856 	free_irq(si->uart_irq, dev);  in pxa_irda_stop()
857 	free_irq(si->icp_irq, dev);  in pxa_irda_stop()
859 	dmaengine_terminate_all(si->rxdma);  in pxa_irda_stop()
860 	dmaengine_terminate_all(si->txdma);  in pxa_irda_stop()
861 	dma_release_channel(si->rxdma);  in pxa_irda_stop()
862 	dma_release_channel(si->txdma);  in pxa_irda_stop()
864 	if (si->dma_rx_buff)  in pxa_irda_stop()
865 		dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);  in pxa_irda_stop()
866 	if (si->dma_tx_buff)  in pxa_irda_stop()
867 		dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);  in pxa_irda_stop()
876 	struct pxa_irda *si;  in pxa_irda_suspend()  local
879 		si = netdev_priv(dev);  in pxa_irda_suspend()
881 		pxa_irda_shutdown(si);  in pxa_irda_suspend()
890 	struct pxa_irda *si;  in pxa_irda_resume()  local
893 		si = netdev_priv(dev);  in pxa_irda_resume()
894 		pxa_irda_startup(si);  in pxa_irda_resume()
926 	struct pxa_irda *si;  in pxa_irda_probe()  local
955 	si = netdev_priv(dev);  in pxa_irda_probe()
956 	si->dev = &pdev->dev;  in pxa_irda_probe()
957 	si->pdata = pdev->dev.platform_data;  in pxa_irda_probe()
959 	si->irda_base = ficp;  in pxa_irda_probe()
960 	si->stuart_base = stuart;  in pxa_irda_probe()
961 	si->uart_irq = platform_get_irq(pdev, 0);  in pxa_irda_probe()
962 	si->icp_irq = platform_get_irq(pdev, 1);  in pxa_irda_probe()
964 	si->sir_clk = devm_clk_get(&pdev->dev, "UARTCLK");  in pxa_irda_probe()
965 	si->fir_clk = devm_clk_get(&pdev->dev, "FICPCLK");  in pxa_irda_probe()
966 	if (IS_ERR(si->sir_clk) || IS_ERR(si->fir_clk)) {  in pxa_irda_probe()
967 		err = PTR_ERR(IS_ERR(si->sir_clk) ? si->sir_clk : si->fir_clk);  in pxa_irda_probe()
973 		si->drcmr_rx = res->start;  in pxa_irda_probe()
976 		si->drcmr_tx = res->start;  in pxa_irda_probe()
981 	err = pxa_irda_init_iobuf(&si->rx_buff, 14384);  in pxa_irda_probe()
984 	err = pxa_irda_init_iobuf(&si->tx_buff, 4000);  in pxa_irda_probe()
988 	if (gpio_is_valid(si->pdata->gpio_pwdown)) {  in pxa_irda_probe()
989 		err = gpio_request(si->pdata->gpio_pwdown, "IrDA switch");  in pxa_irda_probe()
992 		err = gpio_direction_output(si->pdata->gpio_pwdown,  in pxa_irda_probe()
993 					!si->pdata->gpio_pwdown_inverted);  in pxa_irda_probe()
995 			gpio_free(si->pdata->gpio_pwdown);  in pxa_irda_probe()
1000 	if (si->pdata->startup) {  in pxa_irda_probe()
1001 		err = si->pdata->startup(si->dev);  in pxa_irda_probe()
1006 	if (gpio_is_valid(si->pdata->gpio_pwdown) && si->pdata->startup)  in pxa_irda_probe()
1007 		dev_warn(si->dev, "gpio_pwdown and startup() both defined!\n");  in pxa_irda_probe()
1011 	irda_init_max_qos_capabilies(&si->qos);  in pxa_irda_probe()
1014 	if (si->pdata->transceiver_cap & IR_SIRMODE)  in pxa_irda_probe()
1016 	if (si->pdata->transceiver_cap & IR_FIRMODE)  in pxa_irda_probe()
1019 	si->qos.baud_rate.bits &= baudrate_mask;  in pxa_irda_probe()
1020 	si->qos.min_turn_time.bits = 7;  /* 1ms or more */  in pxa_irda_probe()
1022 	irda_qos_bits_to_value(&si->qos);  in pxa_irda_probe()
1030 		if (si->pdata->shutdown)  in pxa_irda_probe()
1031 			si->pdata->shutdown(si->dev);  in pxa_irda_probe()
1033 		kfree(si->tx_buff.head);  in pxa_irda_probe()
1035 		kfree(si->rx_buff.head);  in pxa_irda_probe()
1048 		struct pxa_irda *si = netdev_priv(dev);  in pxa_irda_remove()  local
1050 		if (gpio_is_valid(si->pdata->gpio_pwdown))  in pxa_irda_remove()
1051 			gpio_free(si->pdata->gpio_pwdown);  in pxa_irda_remove()
1052 		if (si->pdata->shutdown)  in pxa_irda_remove()
1053 			si->pdata->shutdown(si->dev);  in pxa_irda_remove()
1054 		kfree(si->tx_buff.head);  in pxa_irda_remove()
1055 		kfree(si->rx_buff.head);  in pxa_irda_remove()