/*
* 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)
#define SIR_UART_GET_DLH(port) bfin_read16((port)->membase + OFFSET_DLH)
#define SIR_UART_GET_IIR(port) bfin_read16((port)->membase + OFFSET_IIR)
#define SIR_UART_GET_LCR(port) bfin_read16((port)->membase + OFFSET_LCR)
#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_PUT_IER(port, v) bfin_write16(((port)->membase + OFFSET_IER), v)
#define SIR_UART_PUT_DLH(port, v) bfin_write16(((port)->membase + OFFSET_DLH), v)
#define SIR_UART_PUT_LCR(port, v) bfin_write16(((port)->membase + OFFSET_LCR), v)
#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
};
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;
};
static inline unsigned int SIR_UART_GET_LSR(struct bfin_sir_port *port)
{
unsigned int lsr = bfin_read16(port->membase + OFFSET_LSR);
port->lsr |= (lsr & (BI|FE|PE|OE));
return lsr | port->lsr;
}
static inline void SIR_UART_CLEAR_LSR(struct bfin_sir_port *port)
{
port->lsr = 0;
bfin_read16(port->membase + OFFSET_LSR);
}
#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
return ret;
}
