summaryrefslogtreecommitdiffstats
path: root/arch/blackfin/mach-bf537/include/mach/bfin_sir.h
blob: cfd8ad4f1f2c33cc34efc32aba570c09eaac42c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/*
 * 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;
}