diff options
Diffstat (limited to 'drivers/media/pci/mantis/mantis_uart.c')
| -rw-r--r-- | drivers/media/pci/mantis/mantis_uart.c | 92 |
1 files changed, 45 insertions, 47 deletions
diff --git a/drivers/media/pci/mantis/mantis_uart.c b/drivers/media/pci/mantis/mantis_uart.c index a70719218631..42983a89e50b 100644 --- a/drivers/media/pci/mantis/mantis_uart.c +++ b/drivers/media/pci/mantis/mantis_uart.c @@ -1,21 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* Mantis PCI bridge driver Copyright (C) Manu Abraham (abraham.manu@gmail.com) - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/kernel.h> @@ -25,16 +13,18 @@ #include <linux/signal.h> #include <linux/sched.h> #include <linux/interrupt.h> +#include <linux/pci.h> -#include "dmxdev.h" -#include "dvbdev.h" -#include "dvb_demux.h" -#include "dvb_frontend.h" -#include "dvb_net.h" +#include <media/dmxdev.h> +#include <media/dvbdev.h> +#include <media/dvb_demux.h> +#include <media/dvb_frontend.h> +#include <media/dvb_net.h> #include "mantis_common.h" #include "mantis_reg.h" #include "mantis_uart.h" +#include "mantis_input.h" struct mantis_uart_params { enum mantis_baud baud_rate; @@ -59,51 +49,61 @@ static struct { { "EVEN" } }; -#define UART_MAX_BUF 16 - -static int mantis_uart_read(struct mantis_pci *mantis, u8 *data) +static void mantis_uart_read(struct mantis_pci *mantis) { struct mantis_hwconfig *config = mantis->hwconfig; - u32 stat = 0, i; + int i, scancode = 0, err = 0; /* get data */ + dprintk(MANTIS_DEBUG, 1, "UART Reading ..."); for (i = 0; i < (config->bytes + 1); i++) { + int data = mmread(MANTIS_UART_RXD); - stat = mmread(MANTIS_UART_STAT); - - if (stat & MANTIS_UART_RXFIFO_FULL) { - dprintk(MANTIS_ERROR, 1, "RX Fifo FULL"); - } - data[i] = mmread(MANTIS_UART_RXD) & 0x3f; + dprintk(MANTIS_DEBUG, 0, " <%02x>", data); - dprintk(MANTIS_DEBUG, 1, "Reading ... <%02x>", data[i] & 0x3f); + scancode = (scancode << 8) | (data & 0x3f); + err |= data; - if (data[i] & (1 << 7)) { + if (data & (1 << 7)) dprintk(MANTIS_ERROR, 1, "UART framing error"); - return -EINVAL; - } - if (data[i] & (1 << 6)) { + + if (data & (1 << 6)) dprintk(MANTIS_ERROR, 1, "UART parity error"); - return -EINVAL; - } } + dprintk(MANTIS_DEBUG, 0, "\n"); - return 0; + if ((err & 0xC0) == 0) + mantis_input_process(mantis, scancode); } static void mantis_uart_work(struct work_struct *work) { struct mantis_pci *mantis = container_of(work, struct mantis_pci, uart_work); - struct mantis_hwconfig *config = mantis->hwconfig; - u8 buf[16]; - int i; + u32 stat; + unsigned long timeout; - mantis_uart_read(mantis, buf); + stat = mmread(MANTIS_UART_STAT); - for (i = 0; i < (config->bytes + 1); i++) - dprintk(MANTIS_INFO, 1, "UART BUF:%d <%02x> ", i, buf[i]); + if (stat & MANTIS_UART_RXFIFO_FULL) + dprintk(MANTIS_ERROR, 1, "RX Fifo FULL"); - dprintk(MANTIS_DEBUG, 0, "\n"); + /* + * MANTIS_UART_RXFIFO_DATA is only set if at least + * config->bytes + 1 bytes are in the FIFO. + */ + + /* FIXME: is 10ms good enough ? */ + timeout = jiffies + msecs_to_jiffies(10); + while (stat & MANTIS_UART_RXFIFO_DATA) { + mantis_uart_read(mantis); + stat = mmread(MANTIS_UART_STAT); + + if (!time_is_after_jiffies(timeout)) + break; + } + + /* re-enable UART (RX) interrupt */ + mantis_unmask_ints(mantis, MANTIS_INT_IRQ1); } static int mantis_uart_setup(struct mantis_pci *mantis, @@ -152,9 +152,6 @@ int mantis_uart_init(struct mantis_pci *mantis) rates[params.baud_rate].string, parity[params.parity].string); - init_waitqueue_head(&mantis->uart_wq); - spin_lock_init(&mantis->uart_lock); - INIT_WORK(&mantis->uart_work, mantis_uart_work); /* disable interrupt */ @@ -169,8 +166,8 @@ int mantis_uart_init(struct mantis_pci *mantis) mmwrite((mmread(MANTIS_UART_CTL) | MANTIS_UART_RXFLUSH), MANTIS_UART_CTL); /* enable interrupt */ - mmwrite(mmread(MANTIS_INT_MASK) | 0x800, MANTIS_INT_MASK); mmwrite(mmread(MANTIS_UART_CTL) | MANTIS_UART_RXINT, MANTIS_UART_CTL); + mantis_unmask_ints(mantis, MANTIS_INT_IRQ1); schedule_work(&mantis->uart_work); dprintk(MANTIS_DEBUG, 1, "UART successfully initialized"); @@ -182,6 +179,7 @@ EXPORT_SYMBOL_GPL(mantis_uart_init); void mantis_uart_exit(struct mantis_pci *mantis) { /* disable interrupt */ + mantis_mask_ints(mantis, MANTIS_INT_IRQ1); mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL); flush_work(&mantis->uart_work); } |