167 lines
4.1 KiB
C
167 lines
4.1 KiB
C
/*
|
|
* Blackfin Infra-red Driver
|
|
*
|
|
* Copyright 2006-2008 Analog Devices Inc.
|
|
*
|
|
* Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*
|
|
*/
|
|
|
|
#include <linux/serial.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/portmux.h>
|
|
|
|
#define SIR_UART_GET_CHAR(port) bfin_read16((port)->membase + OFFSET_RBR)
|
|
#define SIR_UART_GET_DLL(port) bfin_read16((port)->membase + OFFSET_DLL)
|
|
#define SIR_UART_GET_IER(port) bfin_read16((port)->membase + OFFSET_IER_SET)
|
|
#define SIR_UART_GET_DLH(port) bfin_read16((port)->membase + OFFSET_DLH)
|
|
#define SIR_UART_GET_LCR(port) bfin_read16((port)->membase + OFFSET_LCR)
|
|
#define SIR_UART_GET_LSR(port) bfin_read16((port)->membase + OFFSET_LSR)
|
|
#define SIR_UART_GET_GCTL(port) bfin_read16((port)->membase + OFFSET_GCTL)
|
|
|
|
#define SIR_UART_PUT_CHAR(port, v) bfin_write16(((port)->membase + OFFSET_THR), v)
|
|
#define SIR_UART_PUT_DLL(port, v) bfin_write16(((port)->membase + OFFSET_DLL), v)
|
|
#define SIR_UART_SET_IER(port, v) bfin_write16(((port)->membase + OFFSET_IER_SET), v)
|
|
#define SIR_UART_CLEAR_IER(port, v) bfin_write16(((port)->membase + OFFSET_IER_CLEAR), v)
|
|
#define SIR_UART_PUT_DLH(port, v) bfin_write16(((port)->membase + OFFSET_DLH), v)
|
|
#define SIR_UART_PUT_LSR(port, v) bfin_write16(((port)->membase + OFFSET_LSR), v)
|
|
#define SIR_UART_PUT_LCR(port, v) bfin_write16(((port)->membase + OFFSET_LCR), v)
|
|
#define SIR_UART_CLEAR_LSR(port) bfin_write16(((port)->membase + OFFSET_LSR), -1)
|
|
#define SIR_UART_PUT_GCTL(port, v) bfin_write16(((port)->membase + OFFSET_GCTL), v)
|
|
|
|
#ifdef CONFIG_SIR_BFIN_DMA
|
|
struct dma_rx_buf {
|
|
char *buf;
|
|
int head;
|
|
int tail;
|
|
};
|
|
#endif /* CONFIG_SIR_BFIN_DMA */
|
|
|
|
struct bfin_sir_port {
|
|
unsigned char __iomem *membase;
|
|
unsigned int irq;
|
|
unsigned int lsr;
|
|
unsigned long clk;
|
|
struct net_device *dev;
|
|
#ifdef CONFIG_SIR_BFIN_DMA
|
|
int tx_done;
|
|
struct dma_rx_buf rx_dma_buf;
|
|
struct timer_list rx_dma_timer;
|
|
int rx_dma_nrows;
|
|
#endif /* CONFIG_SIR_BFIN_DMA */
|
|
unsigned int tx_dma_channel;
|
|
unsigned int rx_dma_channel;
|
|
};
|
|
|
|
struct bfin_sir_port sir_ports[BFIN_UART_NR_PORTS];
|
|
|
|
struct bfin_sir_port_res {
|
|
unsigned long base_addr;
|
|
int irq;
|
|
unsigned int rx_dma_channel;
|
|
unsigned int tx_dma_channel;
|
|
};
|
|
|
|
struct bfin_sir_port_res bfin_sir_port_resource[] = {
|
|
#ifdef CONFIG_BFIN_SIR0
|
|
{
|
|
0xFFC00400,
|
|
IRQ_UART0_RX,
|
|
CH_UART0_RX,
|
|
CH_UART0_TX,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_BFIN_SIR1
|
|
{
|
|
0xFFC02000,
|
|
IRQ_UART1_RX,
|
|
CH_UART1_RX,
|
|
CH_UART1_TX,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_BFIN_SIR2
|
|
{
|
|
0xFFC02100,
|
|
IRQ_UART2_RX,
|
|
CH_UART2_RX,
|
|
CH_UART2_TX,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_BFIN_SIR3
|
|
{
|
|
0xFFC03100,
|
|
IRQ_UART3_RX,
|
|
CH_UART3_RX,
|
|
CH_UART3_TX,
|
|
},
|
|
#endif
|
|
};
|
|
|
|
int nr_sirs = ARRAY_SIZE(bfin_sir_port_resource);
|
|
|
|
struct bfin_sir_self {
|
|
struct bfin_sir_port *sir_port;
|
|
spinlock_t lock;
|
|
unsigned int open;
|
|
int speed;
|
|
int newspeed;
|
|
|
|
struct sk_buff *txskb;
|
|
struct sk_buff *rxskb;
|
|
struct net_device_stats stats;
|
|
struct device *dev;
|
|
struct irlap_cb *irlap;
|
|
struct qos_info qos;
|
|
|
|
iobuff_t tx_buff;
|
|
iobuff_t rx_buff;
|
|
|
|
struct work_struct work;
|
|
int mtt;
|
|
};
|
|
|
|
#define DRIVER_NAME "bfin_sir"
|
|
|
|
static int bfin_sir_hw_init(void)
|
|
{
|
|
int ret = -ENODEV;
|
|
#ifdef CONFIG_BFIN_SIR0
|
|
ret = peripheral_request(P_UART0_TX, DRIVER_NAME);
|
|
if (ret)
|
|
return ret;
|
|
ret = peripheral_request(P_UART0_RX, DRIVER_NAME);
|
|
if (ret)
|
|
return ret;
|
|
#endif
|
|
|
|
#ifdef CONFIG_BFIN_SIR1
|
|
ret = peripheral_request(P_UART1_TX, DRIVER_NAME);
|
|
if (ret)
|
|
return ret;
|
|
ret = peripheral_request(P_UART1_RX, DRIVER_NAME);
|
|
if (ret)
|
|
return ret;
|
|
#endif
|
|
|
|
#ifdef CONFIG_BFIN_SIR2
|
|
ret = peripheral_request(P_UART2_TX, DRIVER_NAME);
|
|
if (ret)
|
|
return ret;
|
|
ret = peripheral_request(P_UART2_RX, DRIVER_NAME);
|
|
if (ret)
|
|
return ret;
|
|
#endif
|
|
|
|
#ifdef CONFIG_BFIN_SIR3
|
|
ret = peripheral_request(P_UART3_TX, DRIVER_NAME);
|
|
if (ret)
|
|
return ret;
|
|
ret = peripheral_request(P_UART3_RX, DRIVER_NAME);
|
|
if (ret)
|
|
return ret;
|
|
#endif
|
|
return ret;
|
|
}
|