Lines Matching refs:atmel_port
241 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
243 return atmel_port->use_pdc_rx;
248 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
250 return atmel_port->use_pdc_tx;
266 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
268 return atmel_port->use_dma_tx;
273 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
275 return atmel_port->use_dma_rx;
280 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
282 return atmel_port->fifo_size;
285 static void atmel_tasklet_schedule(struct atmel_uart_port *atmel_port,
288 if (!atomic_read(&atmel_port->tasklet_shutdown))
296 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
300 atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask);
307 atmel_port->tx_done_mask = ATMEL_US_TXRDY;
309 atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
318 atmel_port->tx_done_mask = ATMEL_US_ENDTX |
321 atmel_port->tx_done_mask = ATMEL_US_TXRDY;
326 atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask);
334 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
338 mck_rate = (u64)clk_get_rate(atmel_port->clk);
361 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
367 atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask);
405 } else if (fidi < atmel_port->fidi_min
406 || fidi > atmel_port->fidi_max) {
415 atmel_port->backup_mode = atmel_uart_readl(port, ATMEL_US_MR);
416 atmel_port->backup_brgr = atmel_uart_readl(port, ATMEL_US_BRGR);
424 atmel_port->tx_done_mask = ATMEL_US_TXEMPTY | ATMEL_US_NACK | ATMEL_US_ITERATION;
428 mode = atmel_port->backup_mode;
431 atmel_uart_writel(port, ATMEL_US_BRGR, atmel_port->backup_brgr);
435 atmel_port->tx_done_mask = ATMEL_US_ENDTX |
438 atmel_port->tx_done_mask = ATMEL_US_TXRDY;
447 atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask);
457 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
459 if (atmel_port->tx_stopped)
474 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
511 mctrl_gpio_set(atmel_port->gpios, mctrl);
528 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
545 return mctrl_gpio_get(atmel_port->gpios, &ret);
553 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
569 atmel_port->tx_stopped = true;
573 atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask);
576 if (!atomic_read(&atmel_port->tasklet_shutdown))
585 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
604 atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask);
609 atmel_port->tx_stopped = false;
657 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
663 if (atmel_port->ms_irq_enabled)
666 atmel_port->ms_irq_enabled = true;
668 if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_CTS))
671 if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_DSR))
674 if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_RI))
677 if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_DCD))
682 mctrl_gpio_enable_ms(atmel_port->gpios);
690 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
696 if (!atmel_port->ms_irq_enabled)
699 atmel_port->ms_irq_enabled = false;
701 mctrl_gpio_disable_ms(atmel_port->gpios);
703 if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_CTS))
706 if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_DSR))
709 if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_RI))
712 if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_DCD))
738 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
739 struct circ_buf *ring = &atmel_port->rx_ring;
782 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
795 || atmel_port->break_active)) {
801 && !atmel_port->break_active) {
802 atmel_port->break_active = 1;
816 atmel_port->break_active = 0;
824 atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_rx);
833 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
845 atmel_port->tx_done_mask |= ATMEL_US_TXRDY;
849 atmel_port->tx_done_mask);
852 atmel_port->tx_done_mask &= ~ATMEL_US_TXRDY;
858 struct atmel_uart_port *atmel_port = arg;
859 struct uart_port *port = &atmel_port->uart;
861 struct dma_chan *chan = atmel_port->chan_tx;
868 uart_xmit_advance(port, atmel_port->tx_len);
870 spin_lock(&atmel_port->lock_tx);
871 async_tx_ack(atmel_port->desc_tx);
872 atmel_port->cookie_tx = -EINVAL;
873 atmel_port->desc_tx = NULL;
874 spin_unlock(&atmel_port->lock_tx);
885 atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_tx);
891 atmel_port->hd_start_rx = true;
893 atmel_port->tx_done_mask);
901 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
902 struct dma_chan *chan = atmel_port->chan_tx;
907 dma_unmap_sg(port->dev, &atmel_port->sg_tx, 1,
911 atmel_port->desc_tx = NULL;
912 atmel_port->chan_tx = NULL;
913 atmel_port->cookie_tx = -EINVAL;
921 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
923 struct dma_chan *chan = atmel_port->chan_tx;
925 struct scatterlist sgl[2], *sg, *sg_tx = &atmel_port->sg_tx;
930 if (atmel_port->desc_tx != NULL)
947 if (atmel_port->fifo_size) {
978 atmel_port->tx_len = tx_len;
993 atmel_port->desc_tx = desc;
995 desc->callback_param = atmel_port;
996 atmel_port->cookie_tx = dmaengine_submit(desc);
997 if (dma_submit_error(atmel_port->cookie_tx)) {
999 atmel_port->cookie_tx);
1012 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1021 atmel_port->chan_tx = dma_request_slave_channel(mfd_dev, "tx");
1022 if (atmel_port->chan_tx == NULL)
1025 dma_chan_name(atmel_port->chan_tx));
1027 spin_lock_init(&atmel_port->lock_tx);
1028 sg_init_table(&atmel_port->sg_tx, 1);
1031 sg_set_page(&atmel_port->sg_tx,
1036 &atmel_port->sg_tx,
1045 sg_dma_len(&atmel_port->sg_tx),
1047 &sg_dma_address(&atmel_port->sg_tx));
1053 config.dst_addr_width = (atmel_port->fifo_size) ?
1059 ret = dmaengine_slave_config(atmel_port->chan_tx,
1070 atmel_port->use_dma_tx = false;
1071 if (atmel_port->chan_tx)
1079 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1081 atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_rx);
1086 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1087 struct dma_chan *chan = atmel_port->chan_rx;
1092 dma_unmap_sg(port->dev, &atmel_port->sg_rx, 1,
1096 atmel_port->desc_rx = NULL;
1097 atmel_port->chan_rx = NULL;
1098 atmel_port->cookie_rx = -EINVAL;
1103 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1105 struct circ_buf *ring = &atmel_port->rx_ring;
1106 struct dma_chan *chan = atmel_port->chan_rx;
1115 atmel_port->cookie_rx,
1121 atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_rx);
1127 &atmel_port->sg_rx,
1138 ring->head = sg_dma_len(&atmel_port->sg_rx) - state.residue;
1139 BUG_ON(ring->head > sg_dma_len(&atmel_port->sg_rx));
1143 * 0 <= ring->head <= sg_dma_len(&atmel_port->sg_rx)
1146 * 0 <= ring->tail <= sg_dma_len(&atmel_port->sg_rx) - 1
1153 count = sg_dma_len(&atmel_port->sg_rx) - ring->tail;
1166 if (ring->head >= sg_dma_len(&atmel_port->sg_rx))
1174 &atmel_port->sg_rx,
1185 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1193 ring = &atmel_port->rx_ring;
1198 atmel_port->chan_rx = dma_request_slave_channel(mfd_dev, "rx");
1199 if (atmel_port->chan_rx == NULL)
1202 dma_chan_name(atmel_port->chan_rx));
1204 spin_lock_init(&atmel_port->lock_rx);
1205 sg_init_table(&atmel_port->sg_rx, 1);
1208 sg_set_page(&atmel_port->sg_rx,
1213 &atmel_port->sg_rx,
1222 sg_dma_len(&atmel_port->sg_rx),
1224 &sg_dma_address(&atmel_port->sg_rx));
1234 ret = dmaengine_slave_config(atmel_port->chan_rx,
1244 desc = dmaengine_prep_dma_cyclic(atmel_port->chan_rx,
1245 sg_dma_address(&atmel_port->sg_rx),
1246 sg_dma_len(&atmel_port->sg_rx),
1247 sg_dma_len(&atmel_port->sg_rx)/2,
1256 atmel_port->desc_rx = desc;
1257 atmel_port->cookie_rx = dmaengine_submit(desc);
1258 if (dma_submit_error(atmel_port->cookie_rx)) {
1260 atmel_port->cookie_rx);
1264 dma_async_issue_pending(atmel_port->chan_rx);
1270 atmel_port->use_dma_rx = false;
1271 if (atmel_port->chan_rx)
1278 struct atmel_uart_port *atmel_port = from_timer(atmel_port, t,
1280 struct uart_port *port = &atmel_port->uart;
1282 if (!atomic_read(&atmel_port->tasklet_shutdown)) {
1283 tasklet_schedule(&atmel_port->tasklet_rx);
1284 mod_timer(&atmel_port->uart_timer,
1295 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1308 atmel_tasklet_schedule(atmel_port,
1309 &atmel_port->tasklet_rx);
1321 atmel_tasklet_schedule(atmel_port,
1322 &atmel_port->tasklet_rx);
1336 atmel_port->break_active = 0;
1346 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1348 if (pending & atmel_port->tx_done_mask) {
1350 atmel_port->tx_done_mask);
1353 if (atmel_port->hd_start_rx) {
1358 atmel_port->hd_start_rx = false;
1362 atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_tx);
1373 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1378 status_change = status ^ atmel_port->irq_status_prev;
1379 atmel_port->irq_status_prev = status;
1407 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1410 spin_lock(&atmel_port->lock_suspended);
1419 if (atmel_port->suspended) {
1420 atmel_port->pending |= pending;
1421 atmel_port->pending_status = status;
1432 spin_unlock(&atmel_port->lock_suspended);
1439 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1440 struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
1453 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1455 struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
1485 atmel_port->tx_done_mask);
1499 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1500 struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
1516 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1517 struct circ_buf *ring = &atmel_port->rx_ring;
1578 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1582 struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i];
1594 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1597 int rx_idx = atmel_port->pdc_rx_idx;
1606 pdc = &atmel_port->pdc_rx[rx_idx];
1654 atmel_port->pdc_rx_idx = rx_idx;
1666 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1670 struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i];
1676 atmel_port->pdc_rx[0].dma_addr,
1679 kfree(atmel_port->pdc_rx[0].buf);
1681 atmel_port->use_pdc_rx = false;
1692 atmel_port->pdc_rx_idx = 0;
1694 atmel_uart_writel(port, ATMEL_PDC_RPR, atmel_port->pdc_rx[0].dma_addr);
1698 atmel_port->pdc_rx[1].dma_addr);
1709 struct atmel_uart_port *atmel_port = from_tasklet(atmel_port, t,
1711 struct uart_port *port = &atmel_port->uart;
1715 atmel_port->schedule_rx(port);
1721 struct atmel_uart_port *atmel_port = from_tasklet(atmel_port, t,
1723 struct uart_port *port = &atmel_port->uart;
1727 atmel_port->schedule_tx(port);
1731 static void atmel_init_property(struct atmel_uart_port *atmel_port,
1739 atmel_port->use_dma_rx = true;
1740 atmel_port->use_pdc_rx = false;
1742 atmel_port->use_dma_rx = false;
1743 atmel_port->use_pdc_rx = true;
1746 atmel_port->use_dma_rx = false;
1747 atmel_port->use_pdc_rx = false;
1752 atmel_port->use_dma_tx = true;
1753 atmel_port->use_pdc_tx = false;
1755 atmel_port->use_dma_tx = false;
1756 atmel_port->use_pdc_tx = true;
1759 atmel_port->use_dma_tx = false;
1760 atmel_port->use_pdc_tx = false;
1766 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1769 atmel_port->prepare_rx = &atmel_prepare_rx_dma;
1770 atmel_port->schedule_rx = &atmel_rx_from_dma;
1771 atmel_port->release_rx = &atmel_release_rx_dma;
1773 atmel_port->prepare_rx = &atmel_prepare_rx_pdc;
1774 atmel_port->schedule_rx = &atmel_rx_from_pdc;
1775 atmel_port->release_rx = &atmel_release_rx_pdc;
1777 atmel_port->prepare_rx = NULL;
1778 atmel_port->schedule_rx = &atmel_rx_from_ring;
1779 atmel_port->release_rx = NULL;
1783 atmel_port->prepare_tx = &atmel_prepare_tx_dma;
1784 atmel_port->schedule_tx = &atmel_tx_dma;
1785 atmel_port->release_tx = &atmel_release_tx_dma;
1787 atmel_port->prepare_tx = &atmel_prepare_tx_pdc;
1788 atmel_port->schedule_tx = &atmel_tx_pdc;
1789 atmel_port->release_tx = &atmel_release_tx_pdc;
1791 atmel_port->prepare_tx = NULL;
1792 atmel_port->schedule_tx = &atmel_tx_chars;
1793 atmel_port->release_tx = NULL;
1802 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1817 atmel_port->has_frac_baudrate = false;
1818 atmel_port->has_hw_timer = false;
1819 atmel_port->is_usart = false;
1823 atmel_port->has_hw_timer = true;
1824 atmel_port->rtor = ATMEL_UA_RTOR;
1827 atmel_port->has_frac_baudrate = true;
1828 atmel_port->has_hw_timer = true;
1829 atmel_port->is_usart = true;
1830 atmel_port->rtor = ATMEL_US_RTOR;
1836 atmel_port->fidi_min = 3;
1837 atmel_port->fidi_max = 65535;
1840 atmel_port->fidi_min = 3;
1841 atmel_port->fidi_max = 2047;
1844 atmel_port->fidi_min = 1;
1845 atmel_port->fidi_max = 2047;
1857 atmel_port->has_frac_baudrate = true;
1858 atmel_port->has_hw_timer = true;
1859 atmel_port->is_usart = true;
1860 atmel_port->rtor = ATMEL_US_RTOR;
1878 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
1887 atmel_port->ms_irq_enabled = false;
1900 atomic_set(&atmel_port->tasklet_shutdown, 0);
1901 tasklet_setup(&atmel_port->tasklet_rx, atmel_tasklet_rx_func);
1902 tasklet_setup(&atmel_port->tasklet_tx, atmel_tasklet_tx_func);
1907 atmel_init_property(atmel_port, pdev);
1910 if (atmel_port->prepare_rx) {
1911 retval = atmel_port->prepare_rx(port);
1916 if (atmel_port->prepare_tx) {
1917 retval = atmel_port->prepare_tx(port);
1925 if (atmel_port->fifo_size) {
1939 if (atmel_port->rts_high &&
1940 atmel_port->rts_low)
1942 ATMEL_US_RXFTHRES(atmel_port->rts_high) |
1943 ATMEL_US_RXFTHRES2(atmel_port->rts_low);
1949 atmel_port->irq_status_prev = atmel_uart_readl(port, ATMEL_US_CSR);
1957 atmel_port->tx_stopped = false;
1959 timer_setup(&atmel_port->uart_timer, atmel_uart_timer_callback, 0);
1963 if (!atmel_port->has_hw_timer) {
1964 mod_timer(&atmel_port->uart_timer,
1968 atmel_uart_writel(port, atmel_port->rtor,
1979 if (!atmel_port->has_hw_timer) {
1980 mod_timer(&atmel_port->uart_timer,
1984 atmel_uart_writel(port, atmel_port->rtor,
2005 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
2009 atmel_port->pdc_tx.ofs = 0;
2015 atmel_port->tx_len = 0;
2023 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
2032 atomic_inc(&atmel_port->tasklet_shutdown);
2038 del_timer_sync(&atmel_port->uart_timer);
2047 tasklet_kill(&atmel_port->tasklet_rx);
2048 tasklet_kill(&atmel_port->tasklet_tx);
2062 if (atmel_port->release_rx)
2063 atmel_port->release_rx(port);
2064 if (atmel_port->release_tx)
2065 atmel_port->release_tx(port);
2070 atmel_port->rx_ring.head = 0;
2071 atmel_port->rx_ring.tail = 0;
2087 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
2095 clk_prepare_enable(atmel_port->clk);
2098 atmel_uart_writel(port, ATMEL_US_IER, atmel_port->backup_imr);
2102 atmel_port->backup_imr = atmel_uart_readl(port, ATMEL_US_IMR);
2109 clk_disable_unprepare(atmel_port->clk);
2110 if (__clk_is_enabled(atmel_port->gclk))
2111 clk_disable_unprepare(atmel_port->gclk);
2125 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
2135 if (atmel_port->is_usart)
2220 atmel_port->tx_stopped = true;
2241 !mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_CTS)) {
2279 if (atmel_port->has_frac_baudrate) {
2295 if (atmel_port->is_usart && cd > ATMEL_US_CD) {
2308 if (!atmel_port->has_frac_baudrate) {
2309 if (__clk_is_enabled(atmel_port->gclk))
2310 clk_disable_unprepare(atmel_port->gclk);
2311 gclk_rate = clk_round_rate(atmel_port->gclk, 16 * baud);
2312 actual_baud = clk_get_rate(atmel_port->clk) / (16 * cd);
2315 clk_set_rate(atmel_port->gclk, 16 * baud);
2316 ret = clk_prepare_enable(atmel_port->gclk);
2320 if (atmel_port->is_usart) {
2369 atmel_port->tx_stopped = false;
2533 static int atmel_init_port(struct atmel_uart_port *atmel_port,
2537 struct uart_port *port = &atmel_port->uart;
2540 atmel_init_property(atmel_port, pdev);
2555 memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring));
2561 port->uartclk = clk_get_rate(atmel_port->clk);
2568 atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
2571 atmel_port->tx_done_mask = ATMEL_US_ENDTX | ATMEL_US_TXBUFE;
2573 atmel_port->tx_done_mask = ATMEL_US_TXRDY;
2593 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
2602 ATMEL_US_RXRDY | atmel_port->tx_done_mask);
2610 atmel_port->tx_stopped = false;
2665 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
2679 atmel_port->tx_stopped = false;
2753 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
2766 atmel_port->cache.mr = atmel_uart_readl(port, ATMEL_US_MR);
2767 atmel_port->cache.imr = atmel_uart_readl(port, ATMEL_US_IMR);
2768 atmel_port->cache.brgr = atmel_uart_readl(port, ATMEL_US_BRGR);
2769 atmel_port->cache.rtor = atmel_uart_readl(port,
2770 atmel_port->rtor);
2771 atmel_port->cache.ttgr = atmel_uart_readl(port, ATMEL_US_TTGR);
2772 atmel_port->cache.fmr = atmel_uart_readl(port, ATMEL_US_FMR);
2773 atmel_port->cache.fimr = atmel_uart_readl(port, ATMEL_US_FIMR);
2777 atmel_port->may_wakeup = device_may_wakeup(dev);
2781 spin_lock_irqsave(&atmel_port->lock_suspended, flags);
2782 atmel_port->suspended = true;
2783 spin_unlock_irqrestore(&atmel_port->lock_suspended, flags);
2795 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
2799 atmel_uart_writel(port, ATMEL_US_MR, atmel_port->cache.mr);
2800 atmel_uart_writel(port, ATMEL_US_IER, atmel_port->cache.imr);
2801 atmel_uart_writel(port, ATMEL_US_BRGR, atmel_port->cache.brgr);
2802 atmel_uart_writel(port, atmel_port->rtor,
2803 atmel_port->cache.rtor);
2804 atmel_uart_writel(port, ATMEL_US_TTGR, atmel_port->cache.ttgr);
2806 if (atmel_port->fifo_size) {
2810 atmel_port->cache.fmr);
2812 atmel_port->cache.fimr);
2817 spin_lock_irqsave(&atmel_port->lock_suspended, flags);
2818 if (atmel_port->pending) {
2819 atmel_handle_receive(port, atmel_port->pending);
2820 atmel_handle_status(port, atmel_port->pending,
2821 atmel_port->pending_status);
2822 atmel_handle_transmit(port, atmel_port->pending);
2823 atmel_port->pending = 0;
2825 atmel_port->suspended = false;
2826 spin_unlock_irqrestore(&atmel_port->lock_suspended, flags);
2829 device_set_wakeup_enable(dev, atmel_port->may_wakeup);
2834 static void atmel_serial_probe_fifos(struct atmel_uart_port *atmel_port,
2837 atmel_port->fifo_size = 0;
2838 atmel_port->rts_low = 0;
2839 atmel_port->rts_high = 0;
2843 &atmel_port->fifo_size))
2846 if (!atmel_port->fifo_size)
2849 if (atmel_port->fifo_size < ATMEL_MIN_FIFO_SIZE) {
2850 atmel_port->fifo_size = 0;
2863 atmel_port->rts_high = max_t(int, atmel_port->fifo_size >> 1,
2864 atmel_port->fifo_size - ATMEL_RTS_HIGH_OFFSET);
2865 atmel_port->rts_low = max_t(int, atmel_port->fifo_size >> 2,
2866 atmel_port->fifo_size - ATMEL_RTS_LOW_OFFSET);
2869 atmel_port->fifo_size);
2871 atmel_port->rts_high);
2873 atmel_port->rts_low);
2878 struct atmel_uart_port *atmel_port;
2912 atmel_port = &atmel_ports[ret];
2913 atmel_port->backup_imr = 0;
2914 atmel_port->uart.line = ret;
2915 atmel_port->uart.has_sysrq = IS_ENABLED(CONFIG_SERIAL_ATMEL_CONSOLE);
2916 atmel_serial_probe_fifos(atmel_port, pdev);
2918 atomic_set(&atmel_port->tasklet_shutdown, 0);
2919 spin_lock_init(&atmel_port->lock_suspended);
2921 atmel_port->clk = devm_clk_get(&pdev->dev, "usart");
2922 if (IS_ERR(atmel_port->clk)) {
2923 ret = PTR_ERR(atmel_port->clk);
2926 ret = clk_prepare_enable(atmel_port->clk);
2930 atmel_port->gclk = devm_clk_get_optional(&pdev->dev, "gclk");
2931 if (IS_ERR(atmel_port->gclk)) {
2932 ret = PTR_ERR(atmel_port->gclk);
2936 ret = atmel_init_port(atmel_port, pdev);
2940 atmel_port->gpios = mctrl_gpio_init(&atmel_port->uart, 0);
2941 if (IS_ERR(atmel_port->gpios)) {
2942 ret = PTR_ERR(atmel_port->gpios);
2946 if (!atmel_use_pdc_rx(&atmel_port->uart)) {
2953 atmel_port->rx_ring.buf = data;
2956 rs485_enabled = atmel_port->uart.rs485.flags & SER_RS485_ENABLED;
2958 ret = uart_add_one_port(&atmel_uart, &atmel_port->uart);
2963 platform_set_drvdata(pdev, atmel_port);
2966 atmel_uart_writel(&atmel_port->uart, ATMEL_US_MR,
2968 atmel_uart_writel(&atmel_port->uart, ATMEL_US_CR,
2975 atmel_get_ip_name(&atmel_port->uart);
2981 clk_disable_unprepare(atmel_port->clk);
2986 kfree(atmel_port->rx_ring.buf);
2987 atmel_port->rx_ring.buf = NULL;
2989 clk_disable_unprepare(atmel_port->clk);
2990 clear_bit(atmel_port->uart.line, atmel_ports_in_use);
3007 struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
3009 tasklet_kill(&atmel_port->tasklet_rx);
3010 tasklet_kill(&atmel_port->tasklet_tx);
3016 kfree(atmel_port->rx_ring.buf);