linux/drivers/media/dvb/mantis/mantis_uart.c
Alexey Dobriyan b7f080cfe2 net: remove mm.h inclusion from netdevice.h
Remove linux/mm.h inclusion from netdevice.h -- it's unused (I've checked manually).

To prevent mm.h inclusion via other channels also extract "enum dma_data_direction"
definition into separate header. This tiny piece is what gluing netdevice.h with mm.h
via "netdevice.h => dmaengine.h => dma-mapping.h => scatterlist.h => mm.h".
Removal of mm.h from scatterlist.h was tried and was found not feasible
on most archs, so the link was cutoff earlier.

Hope people are OK with tiny include file.

Note, that mm_types.h is still dragged in, but it is a separate story.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 19:17:20 -07:00

189 lines
4.3 KiB
C

/*
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>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include "dmxdev.h"
#include "dvbdev.h"
#include "dvb_demux.h"
#include "dvb_frontend.h"
#include "dvb_net.h"
#include "mantis_common.h"
#include "mantis_reg.h"
#include "mantis_uart.h"
struct mantis_uart_params {
enum mantis_baud baud_rate;
enum mantis_parity parity;
};
static struct {
char string[7];
} rates[5] = {
{ "9600" },
{ "19200" },
{ "38400" },
{ "57600" },
{ "115200" }
};
static struct {
char string[5];
} parity[3] = {
{ "NONE" },
{ "ODD" },
{ "EVEN" }
};
#define UART_MAX_BUF 16
int mantis_uart_read(struct mantis_pci *mantis, u8 *data)
{
struct mantis_hwconfig *config = mantis->hwconfig;
u32 stat = 0, i;
/* get data */
for (i = 0; i < (config->bytes + 1); i++) {
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, 1, "Reading ... <%02x>", data[i] & 0x3f);
if (data[i] & (1 << 7)) {
dprintk(MANTIS_ERROR, 1, "UART framing error");
return -EINVAL;
}
if (data[i] & (1 << 6)) {
dprintk(MANTIS_ERROR, 1, "UART parity error");
return -EINVAL;
}
}
return 0;
}
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;
mantis_uart_read(mantis, buf);
for (i = 0; i < (config->bytes + 1); i++)
dprintk(MANTIS_INFO, 1, "UART BUF:%d <%02x> ", i, buf[i]);
dprintk(MANTIS_DEBUG, 0, "\n");
}
static int mantis_uart_setup(struct mantis_pci *mantis,
struct mantis_uart_params *params)
{
u32 reg;
mmwrite((mmread(MANTIS_UART_CTL) | (params->parity & 0x3)), MANTIS_UART_CTL);
reg = mmread(MANTIS_UART_BAUD);
switch (params->baud_rate) {
case MANTIS_BAUD_9600:
reg |= 0xd8;
break;
case MANTIS_BAUD_19200:
reg |= 0x6c;
break;
case MANTIS_BAUD_38400:
reg |= 0x36;
break;
case MANTIS_BAUD_57600:
reg |= 0x23;
break;
case MANTIS_BAUD_115200:
reg |= 0x11;
break;
default:
return -EINVAL;
}
mmwrite(reg, MANTIS_UART_BAUD);
return 0;
}
int mantis_uart_init(struct mantis_pci *mantis)
{
struct mantis_hwconfig *config = mantis->hwconfig;
struct mantis_uart_params params;
/* default parity: */
params.baud_rate = config->baud_rate;
params.parity = config->parity;
dprintk(MANTIS_INFO, 1, "Initializing UART @ %sbps parity:%s",
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 */
mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL);
mantis_uart_setup(mantis, &params);
/* default 1 byte */
mmwrite((mmread(MANTIS_UART_BAUD) | (config->bytes << 8)), MANTIS_UART_BAUD);
/* flush buffer */
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);
schedule_work(&mantis->uart_work);
dprintk(MANTIS_DEBUG, 1, "UART successfully initialized");
return 0;
}
EXPORT_SYMBOL_GPL(mantis_uart_init);
void mantis_uart_exit(struct mantis_pci *mantis)
{
/* disable interrupt */
mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL);
flush_work_sync(&mantis->uart_work);
}
EXPORT_SYMBOL_GPL(mantis_uart_exit);