aboutsummaryrefslogtreecommitdiff
path: root/include/asm-blackfin/mach-bf533/bfin_serial_5xx.h
blob: 69b9f8e120e93402b5cae571f2e8dfdd26084e49 (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
#include <linux/serial.h>
#include <asm/dma.h>
#include <asm/portmux.h>

#define NR_PORTS                1

#define OFFSET_THR              0x00	/* Transmit Holding register            */
#define OFFSET_RBR              0x00	/* Receive Buffer register              */
#define OFFSET_DLL              0x00	/* Divisor Latch (Low-Byte)             */
#define OFFSET_IER              0x04	/* Interrupt Enable Register            */
#define OFFSET_DLH              0x04	/* Divisor Latch (High-Byte)            */
#define OFFSET_IIR              0x08	/* Interrupt Identification Register    */
#define OFFSET_LCR              0x0C	/* Line Control Register                */
#define OFFSET_MCR              0x10	/* Modem Control Register               */
#define OFFSET_LSR              0x14	/* Line Status Register                 */
#define OFFSET_MSR              0x18	/* Modem Status Register                */
#define OFFSET_SCR              0x1C	/* SCR Scratch Register                 */
#define OFFSET_GCTL             0x24	/* Global Control Register              */

#define UART_GET_CHAR(uart)     bfin_read16(((uart)->port.membase + OFFSET_RBR))
#define UART_GET_DLL(uart)	bfin_read16(((uart)->port.membase + OFFSET_DLL))
#define UART_GET_IER(uart)      bfin_read16(((uart)->port.membase + OFFSET_IER))
#define UART_GET_DLH(uart)	bfin_read16(((uart)->port.membase + OFFSET_DLH))
#define UART_GET_IIR(uart)      bfin_read16(((uart)->port.membase + OFFSET_IIR))
#define UART_GET_LCR(uart)      bfin_read16(((uart)->port.membase + OFFSET_LCR))
#define UART_GET_LSR(uart)      bfin_read16(((uart)->port.membase + OFFSET_LSR))
#define UART_GET_GCTL(uart)     bfin_read16(((uart)->port.membase + OFFSET_GCTL))

#define UART_PUT_CHAR(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_THR),v)
#define UART_PUT_DLL(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_DLL),v)
#define UART_PUT_IER(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_IER),v)
#define UART_PUT_DLH(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_DLH),v)
#define UART_PUT_LCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
#define UART_PUT_GCTL(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)

#ifdef CONFIG_BFIN_UART0_CTSRTS
# define CONFIG_SERIAL_BFIN_CTSRTS
# ifndef CONFIG_UART0_CTS_PIN
#  define CONFIG_UART0_CTS_PIN -1
# endif
# ifndef CONFIG_UART0_RTS_PIN
#  define CONFIG_UART0_RTS_PIN -1
# endif
#endif

struct bfin_serial_port {
        struct uart_port        port;
        unsigned int            old_status;
#ifdef CONFIG_SERIAL_BFIN_DMA
	int			tx_done;
	int			tx_count;
	struct circ_buf		rx_dma_buf;
	struct timer_list       rx_dma_timer;
	int			rx_dma_nrows;
	unsigned int		tx_dma_channel;
	unsigned int		rx_dma_channel;
	struct work_struct	tx_dma_workqueue;
#else
	struct work_struct 	cts_workqueue;
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	int			cts_pin;
	int			rts_pin;
#endif
};

struct bfin_serial_port bfin_serial_ports[NR_PORTS];
struct bfin_serial_res {
	unsigned long	uart_base_addr;
	int		uart_irq;
#ifdef CONFIG_SERIAL_BFIN_DMA
	unsigned int	uart_tx_dma_channel;
	unsigned int	uart_rx_dma_channel;
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	int		uart_cts_pin;
	int		uart_rts_pin;
#endif
};

struct bfin_serial_res bfin_serial_resource[] = {
	{
	0xFFC00400,
	IRQ_UART_RX,
#ifdef CONFIG_SERIAL_BFIN_DMA
	CH_UART_TX,
	CH_UART_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
	CONFIG_UART0_CTS_PIN,
	CONFIG_UART0_RTS_PIN,
#endif
	}
};

#define DRIVER_NAME "bfin-uart"

int nr_ports = NR_PORTS;
static void bfin_serial_hw_init(struct bfin_serial_port *uart)
{

#ifdef CONFIG_SERIAL_BFIN_UART0
	peripheral_request(P_UART0_TX, DRIVER_NAME);
	peripheral_request(P_UART0_RX, DRIVER_NAME);
#endif

#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	if (uart->cts_pin >= 0) {
		gpio_request(uart->cts_pin, DRIVER_NAME);
		gpio_direction_input(uart->cts_pin);
	}
	if (uart->rts_pin >= 0) {
		gpio_request(uart->rts_pin, DRIVER_NAME);
		gpio_direction_input(uart->rts_pin);
	}
#endif
}