diff options
Diffstat (limited to 'drivers/tty/serial/sirfsoc_uart.c')
| -rw-r--r-- | drivers/tty/serial/sirfsoc_uart.c | 622 |
1 files changed, 281 insertions, 341 deletions
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 9de3eabe5..653cdd5fb 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -36,8 +36,6 @@ sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count); static struct uart_driver sirfsoc_uart_drv; static void sirfsoc_uart_tx_dma_complete_callback(void *param); -static void sirfsoc_uart_start_next_rx_dma(struct uart_port *port); -static void sirfsoc_uart_rx_dma_complete_callback(void *param); static const struct sirfsoc_baudrate_to_regv baudrate_to_regv[] = { {4000000, 2359296}, {3500000, 1310721}, @@ -59,50 +57,7 @@ static const struct sirfsoc_baudrate_to_regv baudrate_to_regv[] = { {9600, 1114979}, }; -static struct sirfsoc_uart_port sirfsoc_uart_ports[SIRFSOC_UART_NR] = { - [0] = { - .port = { - .iotype = UPIO_MEM, - .flags = UPF_BOOT_AUTOCONF, - .line = 0, - }, - }, - [1] = { - .port = { - .iotype = UPIO_MEM, - .flags = UPF_BOOT_AUTOCONF, - .line = 1, - }, - }, - [2] = { - .port = { - .iotype = UPIO_MEM, - .flags = UPF_BOOT_AUTOCONF, - .line = 2, - }, - }, - [3] = { - .port = { - .iotype = UPIO_MEM, - .flags = UPF_BOOT_AUTOCONF, - .line = 3, - }, - }, - [4] = { - .port = { - .iotype = UPIO_MEM, - .flags = UPF_BOOT_AUTOCONF, - .line = 4, - }, - }, - [5] = { - .port = { - .iotype = UPIO_MEM, - .flags = UPF_BOOT_AUTOCONF, - .line = 5, - }, - }, -}; +static struct sirfsoc_uart_port *sirf_ports[SIRFSOC_UART_NR]; static inline struct sirfsoc_uart_port *to_sirfport(struct uart_port *port) { @@ -116,8 +71,7 @@ static inline unsigned int sirfsoc_uart_tx_empty(struct uart_port *port) struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status; reg = rd_regl(port, ureg->sirfsoc_tx_fifo_status); - - return (reg & ufifo_st->ff_empty(port->line)) ? TIOCSER_TEMT : 0; + return (reg & ufifo_st->ff_empty(port)) ? TIOCSER_TEMT : 0; } static unsigned int sirfsoc_uart_get_mctrl(struct uart_port *port) @@ -152,6 +106,26 @@ static void sirfsoc_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) unsigned int val = assert ? SIRFUART_AFC_CTRL_RX_THD : 0x0; unsigned int current_val; + if (mctrl & TIOCM_LOOP) { + if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) + wr_regl(port, ureg->sirfsoc_line_ctrl, + rd_regl(port, ureg->sirfsoc_line_ctrl) | + SIRFUART_LOOP_BACK); + else + wr_regl(port, ureg->sirfsoc_mode1, + rd_regl(port, ureg->sirfsoc_mode1) | + SIRFSOC_USP_LOOP_BACK_CTRL); + } else { + if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) + wr_regl(port, ureg->sirfsoc_line_ctrl, + rd_regl(port, ureg->sirfsoc_line_ctrl) & + ~SIRFUART_LOOP_BACK); + else + wr_regl(port, ureg->sirfsoc_mode1, + rd_regl(port, ureg->sirfsoc_mode1) & + ~SIRFSOC_USP_LOOP_BACK_CTRL); + } + if (!sirfport->hw_flow_ctrl || !sirfport->ms_enabled) return; if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) { @@ -182,16 +156,19 @@ static void sirfsoc_uart_stop_tx(struct uart_port *port) rd_regl(port, ureg->sirfsoc_int_en_reg) & ~uint_en->sirfsoc_txfifo_empty_en); else - wr_regl(port, SIRFUART_INT_EN_CLR, + wr_regl(port, ureg->sirfsoc_int_en_clr_reg, uint_en->sirfsoc_txfifo_empty_en); } } else { + if (sirfport->uart_reg->uart_type == SIRF_USP_UART) + wr_regl(port, ureg->sirfsoc_tx_rx_en, rd_regl(port, + ureg->sirfsoc_tx_rx_en) & ~SIRFUART_TX_EN); if (!sirfport->is_atlas7) wr_regl(port, ureg->sirfsoc_int_en_reg, rd_regl(port, ureg->sirfsoc_int_en_reg) & ~uint_en->sirfsoc_txfifo_empty_en); else - wr_regl(port, SIRFUART_INT_EN_CLR, + wr_regl(port, ureg->sirfsoc_int_en_clr_reg, uint_en->sirfsoc_txfifo_empty_en); } } @@ -222,7 +199,7 @@ static void sirfsoc_uart_tx_with_dma(struct sirfsoc_uart_port *sirfport) rd_regl(port, ureg->sirfsoc_int_en_reg)& ~(uint_en->sirfsoc_txfifo_empty_en)); else - wr_regl(port, SIRFUART_INT_EN_CLR, + wr_regl(port, ureg->sirfsoc_int_en_clr_reg, uint_en->sirfsoc_txfifo_empty_en); /* * DMA requires buffer address and buffer length are both aligned with @@ -290,8 +267,11 @@ static void sirfsoc_uart_start_tx(struct uart_port *port) if (sirfport->tx_dma_chan) sirfsoc_uart_tx_with_dma(sirfport); else { - sirfsoc_uart_pio_tx_chars(sirfport, - SIRFSOC_UART_IO_TX_REASONABLE_CNT); + if (sirfport->uart_reg->uart_type == SIRF_USP_UART) + wr_regl(port, ureg->sirfsoc_tx_rx_en, rd_regl(port, + ureg->sirfsoc_tx_rx_en) | SIRFUART_TX_EN); + wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_STOP); + sirfsoc_uart_pio_tx_chars(sirfport, port->fifosize); wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_START); if (!sirfport->is_atlas7) wr_regl(port, ureg->sirfsoc_int_en_reg, @@ -314,21 +294,25 @@ static void sirfsoc_uart_stop_rx(struct uart_port *port) if (!sirfport->is_atlas7) wr_regl(port, ureg->sirfsoc_int_en_reg, rd_regl(port, ureg->sirfsoc_int_en_reg) & - ~(SIRFUART_RX_DMA_INT_EN(port, uint_en) | + ~(SIRFUART_RX_DMA_INT_EN(uint_en, + sirfport->uart_reg->uart_type) | uint_en->sirfsoc_rx_done_en)); else - wr_regl(port, SIRFUART_INT_EN_CLR, - SIRFUART_RX_DMA_INT_EN(port, uint_en)| - uint_en->sirfsoc_rx_done_en); + wr_regl(port, ureg->sirfsoc_int_en_clr_reg, + SIRFUART_RX_DMA_INT_EN(uint_en, + sirfport->uart_reg->uart_type)| + uint_en->sirfsoc_rx_done_en); dmaengine_terminate_all(sirfport->rx_dma_chan); } else { if (!sirfport->is_atlas7) wr_regl(port, ureg->sirfsoc_int_en_reg, rd_regl(port, ureg->sirfsoc_int_en_reg)& - ~(SIRFUART_RX_IO_INT_EN(port, uint_en))); + ~(SIRFUART_RX_IO_INT_EN(uint_en, + sirfport->uart_reg->uart_type))); else - wr_regl(port, SIRFUART_INT_EN_CLR, - SIRFUART_RX_IO_INT_EN(port, uint_en)); + wr_regl(port, ureg->sirfsoc_int_en_clr_reg, + SIRFUART_RX_IO_INT_EN(uint_en, + sirfport->uart_reg->uart_type)); } } @@ -349,7 +333,7 @@ static void sirfsoc_uart_disable_ms(struct uart_port *port) rd_regl(port, ureg->sirfsoc_int_en_reg)& ~uint_en->sirfsoc_cts_en); else - wr_regl(port, SIRFUART_INT_EN_CLR, + wr_regl(port, ureg->sirfsoc_int_en_clr_reg, uint_en->sirfsoc_cts_en); } else disable_irq(gpio_to_irq(sirfport->cts_gpio)); @@ -379,7 +363,8 @@ static void sirfsoc_uart_enable_ms(struct uart_port *port) if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) { wr_regl(port, ureg->sirfsoc_afc_ctrl, rd_regl(port, ureg->sirfsoc_afc_ctrl) | - SIRFUART_AFC_TX_EN | SIRFUART_AFC_RX_EN); + SIRFUART_AFC_TX_EN | SIRFUART_AFC_RX_EN | + SIRFUART_AFC_CTRL_RX_THD); if (!sirfport->is_atlas7) wr_regl(port, ureg->sirfsoc_int_en_reg, rd_regl(port, ureg->sirfsoc_int_en_reg) @@ -417,7 +402,7 @@ sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count) if (!tty) return -ENODEV; while (!(rd_regl(port, ureg->sirfsoc_rx_fifo_status) & - ufifo_st->ff_empty(port->line))) { + ufifo_st->ff_empty(port))) { ch = rd_regl(port, ureg->sirfsoc_rx_fifo_data) | SIRFUART_DUMMY_READ; if (unlikely(uart_handle_sysrq_char(port, ch))) @@ -444,7 +429,7 @@ sirfsoc_uart_pio_tx_chars(struct sirfsoc_uart_port *sirfport, int count) unsigned int num_tx = 0; while (!uart_circ_empty(xmit) && !(rd_regl(port, ureg->sirfsoc_tx_fifo_status) & - ufifo_st->ff_full(port->line)) && + ufifo_st->ff_full(port)) && count--) { wr_regl(port, ureg->sirfsoc_tx_fifo_data, xmit->buf[xmit->tail]); @@ -478,139 +463,6 @@ static void sirfsoc_uart_tx_dma_complete_callback(void *param) spin_unlock_irqrestore(&port->lock, flags); } -static void sirfsoc_uart_insert_rx_buf_to_tty( - struct sirfsoc_uart_port *sirfport, int count) -{ - struct uart_port *port = &sirfport->port; - struct tty_port *tport = &port->state->port; - int inserted; - - inserted = tty_insert_flip_string(tport, - sirfport->rx_dma_items[sirfport->rx_completed].xmit.buf, count); - port->icount.rx += inserted; -} - -static void sirfsoc_rx_submit_one_dma_desc(struct uart_port *port, int index) -{ - struct sirfsoc_uart_port *sirfport = to_sirfport(port); - - sirfport->rx_dma_items[index].xmit.tail = - sirfport->rx_dma_items[index].xmit.head = 0; - sirfport->rx_dma_items[index].desc = - dmaengine_prep_slave_single(sirfport->rx_dma_chan, - sirfport->rx_dma_items[index].dma_addr, SIRFSOC_RX_DMA_BUF_SIZE, - DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT); - if (!sirfport->rx_dma_items[index].desc) { - dev_err(port->dev, "DMA slave single fail\n"); - return; - } - sirfport->rx_dma_items[index].desc->callback = - sirfsoc_uart_rx_dma_complete_callback; - sirfport->rx_dma_items[index].desc->callback_param = sirfport; - sirfport->rx_dma_items[index].cookie = - dmaengine_submit(sirfport->rx_dma_items[index].desc); - dma_async_issue_pending(sirfport->rx_dma_chan); -} - -static void sirfsoc_rx_tmo_process_tl(unsigned long param) -{ - struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)param; - struct uart_port *port = &sirfport->port; - struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; - struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en; - struct sirfsoc_int_status *uint_st = &sirfport->uart_reg->uart_int_st; - unsigned int count; - unsigned long flags; - struct dma_tx_state tx_state; - - spin_lock_irqsave(&port->lock, flags); - while (DMA_COMPLETE == dmaengine_tx_status(sirfport->rx_dma_chan, - sirfport->rx_dma_items[sirfport->rx_completed].cookie, &tx_state)) { - sirfsoc_uart_insert_rx_buf_to_tty(sirfport, - SIRFSOC_RX_DMA_BUF_SIZE); - sirfport->rx_completed++; - sirfport->rx_completed %= SIRFSOC_RX_LOOP_BUF_CNT; - } - count = CIRC_CNT(sirfport->rx_dma_items[sirfport->rx_issued].xmit.head, - sirfport->rx_dma_items[sirfport->rx_issued].xmit.tail, - SIRFSOC_RX_DMA_BUF_SIZE); - if (count > 0) - sirfsoc_uart_insert_rx_buf_to_tty(sirfport, count); - wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, - rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) | - SIRFUART_IO_MODE); - sirfsoc_uart_pio_rx_chars(port, 4 - sirfport->rx_io_count); - if (sirfport->rx_io_count == 4) { - sirfport->rx_io_count = 0; - wr_regl(port, ureg->sirfsoc_int_st_reg, - uint_st->sirfsoc_rx_done); - if (!sirfport->is_atlas7) - wr_regl(port, ureg->sirfsoc_int_en_reg, - rd_regl(port, ureg->sirfsoc_int_en_reg) & - ~(uint_en->sirfsoc_rx_done_en)); - else - wr_regl(port, SIRFUART_INT_EN_CLR, - uint_en->sirfsoc_rx_done_en); - sirfsoc_uart_start_next_rx_dma(port); - } else { - wr_regl(port, ureg->sirfsoc_int_st_reg, - uint_st->sirfsoc_rx_done); - if (!sirfport->is_atlas7) - wr_regl(port, ureg->sirfsoc_int_en_reg, - rd_regl(port, ureg->sirfsoc_int_en_reg) | - (uint_en->sirfsoc_rx_done_en)); - else - wr_regl(port, ureg->sirfsoc_int_en_reg, - uint_en->sirfsoc_rx_done_en); - } - spin_unlock_irqrestore(&port->lock, flags); - tty_flip_buffer_push(&port->state->port); -} - -static void sirfsoc_uart_handle_rx_tmo(struct sirfsoc_uart_port *sirfport) -{ - struct uart_port *port = &sirfport->port; - struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; - struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en; - struct dma_tx_state tx_state; - dmaengine_tx_status(sirfport->rx_dma_chan, - sirfport->rx_dma_items[sirfport->rx_issued].cookie, &tx_state); - dmaengine_terminate_all(sirfport->rx_dma_chan); - sirfport->rx_dma_items[sirfport->rx_issued].xmit.head = - SIRFSOC_RX_DMA_BUF_SIZE - tx_state.residue; - if (!sirfport->is_atlas7) - wr_regl(port, ureg->sirfsoc_int_en_reg, - rd_regl(port, ureg->sirfsoc_int_en_reg) & - ~(uint_en->sirfsoc_rx_timeout_en)); - else - wr_regl(port, SIRFUART_INT_EN_CLR, - uint_en->sirfsoc_rx_timeout_en); - tasklet_schedule(&sirfport->rx_tmo_process_tasklet); -} - -static void sirfsoc_uart_handle_rx_done(struct sirfsoc_uart_port *sirfport) -{ - struct uart_port *port = &sirfport->port; - struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; - struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en; - struct sirfsoc_int_status *uint_st = &sirfport->uart_reg->uart_int_st; - - sirfsoc_uart_pio_rx_chars(port, 4 - sirfport->rx_io_count); - if (sirfport->rx_io_count == 4) { - sirfport->rx_io_count = 0; - if (!sirfport->is_atlas7) - wr_regl(port, ureg->sirfsoc_int_en_reg, - rd_regl(port, ureg->sirfsoc_int_en_reg) & - ~(uint_en->sirfsoc_rx_done_en)); - else - wr_regl(port, SIRFUART_INT_EN_CLR, - uint_en->sirfsoc_rx_done_en); - wr_regl(port, ureg->sirfsoc_int_st_reg, - uint_st->sirfsoc_rx_timeout); - sirfsoc_uart_start_next_rx_dma(port); - } -} - static irqreturn_t sirfsoc_uart_isr(int irq, void *dev_id) { unsigned long intr_status; @@ -628,20 +480,25 @@ static irqreturn_t sirfsoc_uart_isr(int irq, void *dev_id) intr_status = rd_regl(port, ureg->sirfsoc_int_st_reg); wr_regl(port, ureg->sirfsoc_int_st_reg, intr_status); intr_status &= rd_regl(port, ureg->sirfsoc_int_en_reg); - if (unlikely(intr_status & (SIRFUART_ERR_INT_STAT(port, uint_st)))) { + if (unlikely(intr_status & (SIRFUART_ERR_INT_STAT(uint_st, + sirfport->uart_reg->uart_type)))) { if (intr_status & uint_st->sirfsoc_rxd_brk) { port->icount.brk++; if (uart_handle_break(port)) goto recv_char; } - if (intr_status & uint_st->sirfsoc_rx_oflow) + if (intr_status & uint_st->sirfsoc_rx_oflow) { port->icount.overrun++; + flag = TTY_OVERRUN; + } if (intr_status & uint_st->sirfsoc_frm_err) { port->icount.frame++; flag = TTY_FRAME; } - if (intr_status & uint_st->sirfsoc_parity_err) + if (intr_status & uint_st->sirfsoc_parity_err) { + port->icount.parity++; flag = TTY_PARITY; + } wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_RESET); wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0); wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_START); @@ -662,15 +519,51 @@ recv_char: uart_handle_cts_change(port, cts_status); wake_up_interruptible(&state->port.delta_msr_wait); } - if (sirfport->rx_dma_chan) { - if (intr_status & uint_st->sirfsoc_rx_timeout) - sirfsoc_uart_handle_rx_tmo(sirfport); - if (intr_status & uint_st->sirfsoc_rx_done) - sirfsoc_uart_handle_rx_done(sirfport); - } else { - if (intr_status & SIRFUART_RX_IO_INT_ST(uint_st)) - sirfsoc_uart_pio_rx_chars(port, - SIRFSOC_UART_IO_RX_MAX_CNT); + if (!sirfport->rx_dma_chan && + (intr_status & SIRFUART_RX_IO_INT_ST(uint_st))) { + /* + * chip will trigger continuous RX_TIMEOUT interrupt + * in RXFIFO empty and not trigger if RXFIFO recevice + * data in limit time, original method use RX_TIMEOUT + * will trigger lots of useless interrupt in RXFIFO + * empty.RXFIFO received one byte will trigger RX_DONE + * interrupt.use RX_DONE to wait for data received + * into RXFIFO, use RX_THD/RX_FULL for lots data receive + * and use RX_TIMEOUT for the last left data. + */ + if (intr_status & uint_st->sirfsoc_rx_done) { + if (!sirfport->is_atlas7) { + wr_regl(port, ureg->sirfsoc_int_en_reg, + rd_regl(port, ureg->sirfsoc_int_en_reg) + & ~(uint_en->sirfsoc_rx_done_en)); + wr_regl(port, ureg->sirfsoc_int_en_reg, + rd_regl(port, ureg->sirfsoc_int_en_reg) + | (uint_en->sirfsoc_rx_timeout_en)); + } else { + wr_regl(port, ureg->sirfsoc_int_en_clr_reg, + uint_en->sirfsoc_rx_done_en); + wr_regl(port, ureg->sirfsoc_int_en_reg, + uint_en->sirfsoc_rx_timeout_en); + } + } else { + if (intr_status & uint_st->sirfsoc_rx_timeout) { + if (!sirfport->is_atlas7) { + wr_regl(port, ureg->sirfsoc_int_en_reg, + rd_regl(port, ureg->sirfsoc_int_en_reg) + & ~(uint_en->sirfsoc_rx_timeout_en)); + wr_regl(port, ureg->sirfsoc_int_en_reg, + rd_regl(port, ureg->sirfsoc_int_en_reg) + | (uint_en->sirfsoc_rx_done_en)); + } else { + wr_regl(port, + ureg->sirfsoc_int_en_clr_reg, + uint_en->sirfsoc_rx_timeout_en); + wr_regl(port, ureg->sirfsoc_int_en_reg, + uint_en->sirfsoc_rx_done_en); + } + } + sirfsoc_uart_pio_rx_chars(port, port->fifosize); + } } spin_unlock(&port->lock); tty_flip_buffer_push(&state->port); @@ -684,10 +577,10 @@ recv_char: return IRQ_HANDLED; } else { sirfsoc_uart_pio_tx_chars(sirfport, - SIRFSOC_UART_IO_TX_REASONABLE_CNT); + port->fifosize); if ((uart_circ_empty(xmit)) && (rd_regl(port, ureg->sirfsoc_tx_fifo_status) & - ufifo_st->ff_empty(port->line))) + ufifo_st->ff_empty(port))) sirfsoc_uart_stop_tx(port); } } @@ -697,41 +590,8 @@ recv_char: return IRQ_HANDLED; } -static void sirfsoc_uart_rx_dma_complete_tl(unsigned long param) -{ - struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)param; - struct uart_port *port = &sirfport->port; - struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; - struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en; - unsigned long flags; - struct dma_tx_state tx_state; - spin_lock_irqsave(&port->lock, flags); - while (DMA_COMPLETE == dmaengine_tx_status(sirfport->rx_dma_chan, - sirfport->rx_dma_items[sirfport->rx_completed].cookie, &tx_state)) { - sirfsoc_uart_insert_rx_buf_to_tty(sirfport, - SIRFSOC_RX_DMA_BUF_SIZE); - if (rd_regl(port, ureg->sirfsoc_int_en_reg) & - uint_en->sirfsoc_rx_timeout_en) - sirfsoc_rx_submit_one_dma_desc(port, - sirfport->rx_completed++); - else - sirfport->rx_completed++; - sirfport->rx_completed %= SIRFSOC_RX_LOOP_BUF_CNT; - } - spin_unlock_irqrestore(&port->lock, flags); - tty_flip_buffer_push(&port->state->port); -} - static void sirfsoc_uart_rx_dma_complete_callback(void *param) { - struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)param; - unsigned long flags; - - spin_lock_irqsave(&sirfport->port.lock, flags); - sirfport->rx_issued++; - sirfport->rx_issued %= SIRFSOC_RX_LOOP_BUF_CNT; - tasklet_schedule(&sirfport->rx_dma_complete_tasklet); - spin_unlock_irqrestore(&sirfport->port.lock, flags); } /* submit rx dma task into dmaengine */ @@ -740,21 +600,36 @@ static void sirfsoc_uart_start_next_rx_dma(struct uart_port *port) struct sirfsoc_uart_port *sirfport = to_sirfport(port); struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en; - int i; sirfport->rx_io_count = 0; wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) & ~SIRFUART_IO_MODE); - for (i = 0; i < SIRFSOC_RX_LOOP_BUF_CNT; i++) - sirfsoc_rx_submit_one_dma_desc(port, i); - sirfport->rx_completed = sirfport->rx_issued = 0; + sirfport->rx_dma_items.xmit.tail = + sirfport->rx_dma_items.xmit.head = 0; + sirfport->rx_dma_items.desc = + dmaengine_prep_dma_cyclic(sirfport->rx_dma_chan, + sirfport->rx_dma_items.dma_addr, SIRFSOC_RX_DMA_BUF_SIZE, + SIRFSOC_RX_DMA_BUF_SIZE / 2, + DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT); + if (IS_ERR_OR_NULL(sirfport->rx_dma_items.desc)) { + dev_err(port->dev, "DMA slave single fail\n"); + return; + } + sirfport->rx_dma_items.desc->callback = + sirfsoc_uart_rx_dma_complete_callback; + sirfport->rx_dma_items.desc->callback_param = sirfport; + sirfport->rx_dma_items.cookie = + dmaengine_submit(sirfport->rx_dma_items.desc); + dma_async_issue_pending(sirfport->rx_dma_chan); if (!sirfport->is_atlas7) wr_regl(port, ureg->sirfsoc_int_en_reg, rd_regl(port, ureg->sirfsoc_int_en_reg) | - SIRFUART_RX_DMA_INT_EN(port, uint_en)); + SIRFUART_RX_DMA_INT_EN(uint_en, + sirfport->uart_reg->uart_type)); else wr_regl(port, ureg->sirfsoc_int_en_reg, - SIRFUART_RX_DMA_INT_EN(port, uint_en)); + SIRFUART_RX_DMA_INT_EN(uint_en, + sirfport->uart_reg->uart_type)); } static void sirfsoc_uart_start_rx(struct uart_port *port) @@ -773,10 +648,12 @@ static void sirfsoc_uart_start_rx(struct uart_port *port) if (!sirfport->is_atlas7) wr_regl(port, ureg->sirfsoc_int_en_reg, rd_regl(port, ureg->sirfsoc_int_en_reg) | - SIRFUART_RX_IO_INT_EN(port, uint_en)); + SIRFUART_RX_IO_INT_EN(uint_en, + sirfport->uart_reg->uart_type)); else wr_regl(port, ureg->sirfsoc_int_en_reg, - SIRFUART_RX_IO_INT_EN(port, uint_en)); + SIRFUART_RX_IO_INT_EN(uint_en, + sirfport->uart_reg->uart_type)); } } @@ -789,7 +666,7 @@ sirfsoc_usp_calc_sample_div(unsigned long set_rate, unsigned long ioclk_div = 0; unsigned long temp_delta; - for (sample_div = SIRF_MIN_SAMPLE_DIV; + for (sample_div = SIRF_USP_MIN_SAMPLE_DIV; sample_div <= SIRF_MAX_SAMPLE_DIV; sample_div++) { temp_delta = ioclk_rate - (ioclk_rate + (set_rate * sample_div) / 2) @@ -910,10 +787,11 @@ static void sirfsoc_uart_set_termios(struct uart_port *port, config_reg |= SIRFUART_STICK_BIT_MARK; else config_reg |= SIRFUART_STICK_BIT_SPACE; - } else if (termios->c_cflag & PARODD) { - config_reg |= SIRFUART_STICK_BIT_ODD; } else { - config_reg |= SIRFUART_STICK_BIT_EVEN; + if (termios->c_cflag & PARODD) + config_reg |= SIRFUART_STICK_BIT_ODD; + else + config_reg |= SIRFUART_STICK_BIT_EVEN; } } } else { @@ -976,7 +854,7 @@ static void sirfsoc_uart_set_termios(struct uart_port *port, wr_regl(port, ureg->sirfsoc_tx_fifo_op, (txfifo_op_reg & ~SIRFUART_FIFO_START)); if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) { - config_reg |= SIRFUART_RECV_TIMEOUT(port, rx_time_out); + config_reg |= SIRFUART_UART_RECV_TIMEOUT(rx_time_out); wr_regl(port, ureg->sirfsoc_line_ctrl, config_reg); } else { /*tx frame ctrl*/ @@ -999,7 +877,7 @@ static void sirfsoc_uart_set_termios(struct uart_port *port, wr_regl(port, ureg->sirfsoc_rx_frame_ctrl, len_val); /*async param*/ wr_regl(port, ureg->sirfsoc_async_param_reg, - (SIRFUART_RECV_TIMEOUT(port, rx_time_out)) | + (SIRFUART_USP_RECV_TIMEOUT(rx_time_out)) | (sample_div_reg & SIRFSOC_USP_ASYNC_DIV2_MASK) << SIRFSOC_USP_ASYNC_DIV2_OFFSET); } @@ -1011,6 +889,7 @@ static void sirfsoc_uart_set_termios(struct uart_port *port, wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, SIRFUART_DMA_MODE); else wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, SIRFUART_IO_MODE); + sirfport->rx_period_time = 20000000; /* Reset Rx/Tx FIFO Threshold level for proper baudrate */ if (set_baud < 1000000) threshold_div = 1; @@ -1032,19 +911,10 @@ static void sirfsoc_uart_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { struct sirfsoc_uart_port *sirfport = to_sirfport(port); - if (!state) { - if (sirfport->is_bt_uart) { - clk_prepare_enable(sirfport->clk_noc); - clk_prepare_enable(sirfport->clk_general); - } + if (!state) clk_prepare_enable(sirfport->clk); - } else { + else clk_disable_unprepare(sirfport->clk); - if (sirfport->is_bt_uart) { - clk_disable_unprepare(sirfport->clk_general); - clk_disable_unprepare(sirfport->clk_noc); - } - } } static int sirfsoc_uart_startup(struct uart_port *port) @@ -1053,7 +923,7 @@ static int sirfsoc_uart_startup(struct uart_port *port) struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; unsigned int index = port->line; int ret; - set_irq_flags(port->irq, IRQF_VALID | IRQF_NOAUTOEN); + irq_modify_status(port->irq, IRQ_NOREQUEST, IRQ_NOAUTOEN); ret = request_irq(port->irq, sirfsoc_uart_isr, 0, @@ -1064,7 +934,6 @@ static int sirfsoc_uart_startup(struct uart_port *port) index, port->irq); goto irq_err; } - /* initial hardware settings */ wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl, rd_regl(port, ureg->sirfsoc_tx_dma_io_ctrl) | @@ -1072,6 +941,9 @@ static int sirfsoc_uart_startup(struct uart_port *port) wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) | SIRFUART_IO_MODE); + wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, + rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) & + ~SIRFUART_RX_DMA_FLUSH); wr_regl(port, ureg->sirfsoc_tx_dma_io_len, 0); wr_regl(port, ureg->sirfsoc_rx_dma_io_len, 0); wr_regl(port, ureg->sirfsoc_tx_rx_en, SIRFUART_RX_EN | SIRFUART_TX_EN); @@ -1080,7 +952,6 @@ static int sirfsoc_uart_startup(struct uart_port *port) SIRFSOC_USP_ENDIAN_CTRL_LSBF | SIRFSOC_USP_EN); wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_RESET); - wr_regl(port, ureg->sirfsoc_tx_fifo_op, 0); wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_RESET); wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0); wr_regl(port, ureg->sirfsoc_tx_fifo_ctrl, SIRFUART_FIFO_THD(port)); @@ -1100,8 +971,8 @@ static int sirfsoc_uart_startup(struct uart_port *port) sirfport->ms_enabled = false; if (sirfport->uart_reg->uart_type == SIRF_USP_UART && sirfport->hw_flow_ctrl) { - set_irq_flags(gpio_to_irq(sirfport->cts_gpio), - IRQF_VALID | IRQF_NOAUTOEN); + irq_modify_status(gpio_to_irq(sirfport->cts_gpio), + IRQ_NOREQUEST, IRQ_NOAUTOEN); ret = request_irq(gpio_to_irq(sirfport->cts_gpio), sirfsoc_uart_usp_cts_handler, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, "usp_cts_irq", sirfport); @@ -1110,8 +981,16 @@ static int sirfsoc_uart_startup(struct uart_port *port) goto init_rx_err; } } - enable_irq(port->irq); + if (sirfport->rx_dma_chan && !sirfport->is_hrt_enabled) { + sirfport->is_hrt_enabled = true; + sirfport->rx_period_time = 20000000; + sirfport->rx_dma_items.xmit.tail = + sirfport->rx_dma_items.xmit.head = 0; + hrtimer_start(&sirfport->hrt, + ns_to_ktime(sirfport->rx_period_time), + HRTIMER_MODE_REL); + } return 0; init_rx_err: @@ -1127,7 +1006,7 @@ static void sirfsoc_uart_shutdown(struct uart_port *port) if (!sirfport->is_atlas7) wr_regl(port, ureg->sirfsoc_int_en_reg, 0); else - wr_regl(port, SIRFUART_INT_EN_CLR, ~0UL); + wr_regl(port, ureg->sirfsoc_int_en_clr_reg, ~0UL); free_irq(port->irq, sirfport); if (sirfport->ms_enabled) @@ -1139,6 +1018,13 @@ static void sirfsoc_uart_shutdown(struct uart_port *port) } if (sirfport->tx_dma_chan) sirfport->tx_dma_state = TX_DMA_IDLE; + if (sirfport->rx_dma_chan && sirfport->is_hrt_enabled) { + while ((rd_regl(port, ureg->sirfsoc_rx_fifo_status) & + SIRFUART_RX_FIFO_MASK) > 0) + ; + sirfport->is_hrt_enabled = false; + hrtimer_cancel(&sirfport->hrt); + } } static const char *sirfsoc_uart_type(struct uart_port *port) @@ -1196,27 +1082,29 @@ sirfsoc_uart_console_setup(struct console *co, char *options) unsigned int bits = 8; unsigned int parity = 'n'; unsigned int flow = 'n'; - struct uart_port *port = &sirfsoc_uart_ports[co->index].port; - struct sirfsoc_uart_port *sirfport = to_sirfport(port); - struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; + struct sirfsoc_uart_port *sirfport; + struct sirfsoc_register *ureg; if (co->index < 0 || co->index >= SIRFSOC_UART_NR) - return -EINVAL; - - if (!port->mapbase) + co->index = 1; + sirfport = sirf_ports[co->index]; + if (!sirfport) + return -ENODEV; + ureg = &sirfport->uart_reg->uart_reg; + if (!sirfport->port.mapbase) return -ENODEV; /* enable usp in mode1 register */ if (sirfport->uart_reg->uart_type == SIRF_USP_UART) - wr_regl(port, ureg->sirfsoc_mode1, SIRFSOC_USP_EN | + wr_regl(&sirfport->port, ureg->sirfsoc_mode1, SIRFSOC_USP_EN | SIRFSOC_USP_ENDIAN_CTRL_LSBF); if (options) uart_parse_options(options, &baud, &parity, &bits, &flow); - port->cons = co; + sirfport->port.cons = co; /* default console tx/rx transfer using io mode */ sirfport->rx_dma_chan = NULL; sirfport->tx_dma_chan = NULL; - return uart_set_options(port, co, baud, parity, bits, flow); + return uart_set_options(&sirfport->port, co, baud, parity, bits, flow); } static void sirfsoc_uart_console_putchar(struct uart_port *port, int ch) @@ -1224,8 +1112,8 @@ static void sirfsoc_uart_console_putchar(struct uart_port *port, int ch) struct sirfsoc_uart_port *sirfport = to_sirfport(port); struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg; struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status; - while (rd_regl(port, - ureg->sirfsoc_tx_fifo_status) & ufifo_st->ff_full(port->line)) + while (rd_regl(port, ureg->sirfsoc_tx_fifo_status) & + ufifo_st->ff_full(port)) cpu_relax(); wr_regl(port, ureg->sirfsoc_tx_fifo_data, ch); } @@ -1233,8 +1121,10 @@ static void sirfsoc_uart_console_putchar(struct uart_port *port, int ch) static void sirfsoc_uart_console_write(struct console *co, const char *s, unsigned int count) { - struct uart_port *port = &sirfsoc_uart_ports[co->index].port; - uart_console_write(port, s, count, sirfsoc_uart_console_putchar); + struct sirfsoc_uart_port *sirfport = sirf_ports[co->index]; + + uart_console_write(&sirfport->port, s, count, + sirfsoc_uart_console_putchar); } static struct console sirfsoc_uart_console = { @@ -1269,10 +1159,75 @@ static struct uart_driver sirfsoc_uart_drv = { #endif }; -static const struct of_device_id sirfsoc_uart_ids[] = { +static enum hrtimer_restart + sirfsoc_uart_rx_dma_hrtimer_callback(struct hrtimer *hrt) +{ + struct sirfsoc_uart_port *sirfport; + struct uart_port *port; + int count, inserted; + struct dma_tx_state tx_state; + struct tty_struct *tty; + struct sirfsoc_register *ureg; + struct circ_buf *xmit; + + sirfport = container_of(hrt, struct sirfsoc_uart_port, hrt); + port = &sirfport->port; + inserted = 0; + tty = port->state->port.tty; + ureg = &sirfport->uart_reg->uart_reg; + xmit = &sirfport->rx_dma_items.xmit; + dmaengine_tx_status(sirfport->rx_dma_chan, + sirfport->rx_dma_items.cookie, &tx_state); + xmit->head = SIRFSOC_RX_DMA_BUF_SIZE - tx_state.residue; + count = CIRC_CNT_TO_END(xmit->head, xmit->tail, + SIRFSOC_RX_DMA_BUF_SIZE); + while (count > 0) { + inserted = tty_insert_flip_string(tty->port, + (const unsigned char *)&xmit->buf[xmit->tail], count); + if (!inserted) + goto next_hrt; + port->icount.rx += inserted; + xmit->tail = (xmit->tail + inserted) & + (SIRFSOC_RX_DMA_BUF_SIZE - 1); + count = CIRC_CNT_TO_END(xmit->head, xmit->tail, + SIRFSOC_RX_DMA_BUF_SIZE); + tty_flip_buffer_push(tty->port); + } + /* + * if RX DMA buffer data have all push into tty buffer, and there is + * only little data(less than a dma transfer unit) left in rxfifo, + * fetch it out in pio mode and switch back to dma immediately + */ + if (!inserted && !count && + ((rd_regl(port, ureg->sirfsoc_rx_fifo_status) & + SIRFUART_RX_FIFO_MASK) > 0)) { + /* switch to pio mode */ + wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, + rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) | + SIRFUART_IO_MODE); + while ((rd_regl(port, ureg->sirfsoc_rx_fifo_status) & + SIRFUART_RX_FIFO_MASK) > 0) { + if (sirfsoc_uart_pio_rx_chars(port, 16) > 0) + tty_flip_buffer_push(tty->port); + } + wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_RESET); + wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0); + wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_START); + /* switch back to dma mode */ + wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, + rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) & + ~SIRFUART_IO_MODE); + } +next_hrt: + hrtimer_forward_now(hrt, ns_to_ktime(sirfport->rx_period_time)); + return HRTIMER_RESTART; +} + +static struct of_device_id sirfsoc_uart_ids[] = { { .compatible = "sirf,prima2-uart", .data = &sirfsoc_uart,}, { .compatible = "sirf,atlas7-uart", .data = &sirfsoc_uart}, { .compatible = "sirf,prima2-usp-uart", .data = &sirfsoc_usp}, + { .compatible = "sirf,atlas7-usp-uart", .data = &sirfsoc_usp}, {} }; MODULE_DEVICE_TABLE(of, sirfsoc_uart_ids); @@ -1283,7 +1238,6 @@ static int sirfsoc_uart_probe(struct platform_device *pdev) struct uart_port *port; struct resource *res; int ret; - int i, j; struct dma_slave_config slv_cfg = { .src_maxburst = 2, }; @@ -1293,16 +1247,15 @@ static int sirfsoc_uart_probe(struct platform_device *pdev) const struct of_device_id *match; match = of_match_node(sirfsoc_uart_ids, pdev->dev.of_node); - if (of_property_read_u32(pdev->dev.of_node, "cell-index", &pdev->id)) { - dev_err(&pdev->dev, - "Unable to find cell-index in uart node.\n"); - ret = -EFAULT; + sirfport = devm_kzalloc(&pdev->dev, sizeof(*sirfport), GFP_KERNEL); + if (!sirfport) { + ret = -ENOMEM; goto err; } - if (of_device_is_compatible(pdev->dev.of_node, "sirf,prima2-usp-uart")) - pdev->id += ((struct sirfsoc_uart_register *) - match->data)->uart_param.register_uart_nr; - sirfport = &sirfsoc_uart_ports[pdev->id]; + sirfport->port.line = of_alias_get_id(pdev->dev.of_node, "serial"); + sirf_ports[sirfport->port.line] = sirfport; + sirfport->port.iotype = UPIO_MEM; + sirfport->port.flags = UPF_BOOT_AUTOCONF; port = &sirfport->port; port->dev = &pdev->dev; port->private_data = sirfport; @@ -1310,9 +1263,12 @@ static int sirfsoc_uart_probe(struct platform_device *pdev) sirfport->hw_flow_ctrl = of_property_read_bool(pdev->dev.of_node, "sirf,uart-has-rtscts"); - if (of_device_is_compatible(pdev->dev.of_node, "sirf,prima2-uart")) + if (of_device_is_compatible(pdev->dev.of_node, "sirf,prima2-uart") || + of_device_is_compatible(pdev->dev.of_node, "sirf,atlas7-uart")) sirfport->uart_reg->uart_type = SIRF_REAL_UART; - if (of_device_is_compatible(pdev->dev.of_node, "sirf,prima2-usp-uart")) { + if (of_device_is_compatible(pdev->dev.of_node, + "sirf,prima2-usp-uart") || of_device_is_compatible( + pdev->dev.of_node, "sirf,atlas7-usp-uart")) { sirfport->uart_reg->uart_type = SIRF_USP_UART; if (!sirfport->hw_flow_ctrl) goto usp_no_flow_control; @@ -1350,7 +1306,8 @@ static int sirfsoc_uart_probe(struct platform_device *pdev) gpio_direction_output(sirfport->rts_gpio, 1); } usp_no_flow_control: - if (of_device_is_compatible(pdev->dev.of_node, "sirf,atlas7-uart")) + if (of_device_is_compatible(pdev->dev.of_node, "sirf,atlas7-uart") || + of_device_is_compatible(pdev->dev.of_node, "sirf,atlas7-usp-uart")) sirfport->is_atlas7 = true; if (of_property_read_u32(pdev->dev.of_node, @@ -1368,12 +1325,9 @@ usp_no_flow_control: ret = -EFAULT; goto err; } - tasklet_init(&sirfport->rx_dma_complete_tasklet, - sirfsoc_uart_rx_dma_complete_tl, (unsigned long)sirfport); - tasklet_init(&sirfport->rx_tmo_process_tasklet, - sirfsoc_rx_tmo_process_tl, (unsigned long)sirfport); port->mapbase = res->start; - port->membase = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + port->membase = devm_ioremap(&pdev->dev, + res->start, resource_size(res)); if (!port->membase) { dev_err(&pdev->dev, "Cannot remap resource.\n"); ret = -ENOMEM; @@ -1393,20 +1347,6 @@ usp_no_flow_control: goto err; } port->uartclk = clk_get_rate(sirfport->clk); - if (of_device_is_compatible(pdev->dev.of_node, "sirf,atlas7-bt-uart")) { - sirfport->clk_general = devm_clk_get(&pdev->dev, "general"); - if (IS_ERR(sirfport->clk_general)) { - ret = PTR_ERR(sirfport->clk_general); - goto err; - } - sirfport->clk_noc = devm_clk_get(&pdev->dev, "noc"); - if (IS_ERR(sirfport->clk_noc)) { - ret = PTR_ERR(sirfport->clk_noc); - goto err; - } - sirfport->is_bt_uart = true; - } else - sirfport->is_bt_uart = false; port->ops = &sirfsoc_uart_ops; spin_lock_init(&port->lock); @@ -1419,30 +1359,32 @@ usp_no_flow_control: } sirfport->rx_dma_chan = dma_request_slave_channel(port->dev, "rx"); - for (i = 0; sirfport->rx_dma_chan && i < SIRFSOC_RX_LOOP_BUF_CNT; i++) { - sirfport->rx_dma_items[i].xmit.buf = - dma_alloc_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE, - &sirfport->rx_dma_items[i].dma_addr, GFP_KERNEL); - if (!sirfport->rx_dma_items[i].xmit.buf) { - dev_err(port->dev, "Uart alloc bufa failed\n"); - ret = -ENOMEM; - goto alloc_coherent_err; - } - sirfport->rx_dma_items[i].xmit.head = - sirfport->rx_dma_items[i].xmit.tail = 0; + sirfport->rx_dma_items.xmit.buf = + dma_alloc_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE, + &sirfport->rx_dma_items.dma_addr, GFP_KERNEL); + if (!sirfport->rx_dma_items.xmit.buf) { + dev_err(port->dev, "Uart alloc bufa failed\n"); + ret = -ENOMEM; + goto alloc_coherent_err; } + sirfport->rx_dma_items.xmit.head = + sirfport->rx_dma_items.xmit.tail = 0; if (sirfport->rx_dma_chan) dmaengine_slave_config(sirfport->rx_dma_chan, &slv_cfg); sirfport->tx_dma_chan = dma_request_slave_channel(port->dev, "tx"); if (sirfport->tx_dma_chan) dmaengine_slave_config(sirfport->tx_dma_chan, &tx_slv_cfg); + if (sirfport->rx_dma_chan) { + hrtimer_init(&sirfport->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + sirfport->hrt.function = sirfsoc_uart_rx_dma_hrtimer_callback; + sirfport->is_hrt_enabled = false; + } return 0; alloc_coherent_err: - for (j = 0; j < i; j++) - dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE, - sirfport->rx_dma_items[j].xmit.buf, - sirfport->rx_dma_items[j].dma_addr); + dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE, + sirfport->rx_dma_items.xmit.buf, + sirfport->rx_dma_items.dma_addr); dma_release_channel(sirfport->rx_dma_chan); err: return ret; @@ -1454,13 +1396,11 @@ static int sirfsoc_uart_remove(struct platform_device *pdev) struct uart_port *port = &sirfport->port; uart_remove_one_port(&sirfsoc_uart_drv, port); if (sirfport->rx_dma_chan) { - int i; dmaengine_terminate_all(sirfport->rx_dma_chan); dma_release_channel(sirfport->rx_dma_chan); - for (i = 0; i < SIRFSOC_RX_LOOP_BUF_CNT; i++) - dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE, - sirfport->rx_dma_items[i].xmit.buf, - sirfport->rx_dma_items[i].dma_addr); + dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE, + sirfport->rx_dma_items.xmit.buf, + sirfport->rx_dma_items.dma_addr); } if (sirfport->tx_dma_chan) { dmaengine_terminate_all(sirfport->tx_dma_chan); |