diff options
Diffstat (limited to 'arch/ppc/boot/common/ns16550.c')
-rw-r--r-- | arch/ppc/boot/common/ns16550.c | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/arch/ppc/boot/common/ns16550.c b/arch/ppc/boot/common/ns16550.c deleted file mode 100644 index fc5b72041948..000000000000 --- a/arch/ppc/boot/common/ns16550.c +++ /dev/null | |||
@@ -1,103 +0,0 @@ | |||
1 | /* | ||
2 | * COM1 NS16550 support | ||
3 | */ | ||
4 | |||
5 | #include <linux/types.h> | ||
6 | #include <linux/serial.h> | ||
7 | #include <linux/serial_reg.h> | ||
8 | #include <asm/serial.h> | ||
9 | |||
10 | #if defined(CONFIG_XILINX_VIRTEX) | ||
11 | #include <platforms/4xx/xparameters/xparameters.h> | ||
12 | #endif | ||
13 | #include "nonstdio.h" | ||
14 | #include "serial.h" | ||
15 | |||
16 | #define SERIAL_BAUD 9600 | ||
17 | |||
18 | extern unsigned long ISA_io; | ||
19 | |||
20 | static struct serial_state rs_table[RS_TABLE_SIZE] = { | ||
21 | SERIAL_PORT_DFNS /* Defined in <asm/serial.h> */ | ||
22 | }; | ||
23 | |||
24 | static int shift; | ||
25 | |||
26 | unsigned long serial_init(int chan, void *ignored) | ||
27 | { | ||
28 | unsigned long com_port, base_baud; | ||
29 | unsigned char lcr, dlm; | ||
30 | |||
31 | /* We need to find out which type io we're expecting. If it's | ||
32 | * 'SERIAL_IO_PORT', we get an offset from the isa_io_base. | ||
33 | * If it's 'SERIAL_IO_MEM', we can the exact location. -- Tom */ | ||
34 | switch (rs_table[chan].io_type) { | ||
35 | case SERIAL_IO_PORT: | ||
36 | com_port = rs_table[chan].port; | ||
37 | break; | ||
38 | case SERIAL_IO_MEM: | ||
39 | com_port = (unsigned long)rs_table[chan].iomem_base; | ||
40 | break; | ||
41 | default: | ||
42 | /* We can't deal with it. */ | ||
43 | return -1; | ||
44 | } | ||
45 | |||
46 | /* How far apart the registers are. */ | ||
47 | shift = rs_table[chan].iomem_reg_shift; | ||
48 | /* Base baud.. */ | ||
49 | base_baud = rs_table[chan].baud_base; | ||
50 | |||
51 | /* save the LCR */ | ||
52 | lcr = inb(com_port + (UART_LCR << shift)); | ||
53 | /* Access baud rate */ | ||
54 | outb(com_port + (UART_LCR << shift), 0x80); | ||
55 | dlm = inb(com_port + (UART_DLM << shift)); | ||
56 | /* | ||
57 | * Test if serial port is unconfigured. | ||
58 | * We assume that no-one uses less than 110 baud or | ||
59 | * less than 7 bits per character these days. | ||
60 | * -- paulus. | ||
61 | */ | ||
62 | |||
63 | if ((dlm <= 4) && (lcr & 2)) | ||
64 | /* port is configured, put the old LCR back */ | ||
65 | outb(com_port + (UART_LCR << shift), lcr); | ||
66 | else { | ||
67 | /* Input clock. */ | ||
68 | outb(com_port + (UART_DLL << shift), | ||
69 | (base_baud / SERIAL_BAUD) & 0xFF); | ||
70 | outb(com_port + (UART_DLM << shift), | ||
71 | (base_baud / SERIAL_BAUD) >> 8); | ||
72 | /* 8 data, 1 stop, no parity */ | ||
73 | outb(com_port + (UART_LCR << shift), 0x03); | ||
74 | /* RTS/DTR */ | ||
75 | outb(com_port + (UART_MCR << shift), 0x03); | ||
76 | } | ||
77 | /* Clear & enable FIFOs */ | ||
78 | outb(com_port + (UART_FCR << shift), 0x07); | ||
79 | |||
80 | return (com_port); | ||
81 | } | ||
82 | |||
83 | void | ||
84 | serial_putc(unsigned long com_port, unsigned char c) | ||
85 | { | ||
86 | while ((inb(com_port + (UART_LSR << shift)) & UART_LSR_THRE) == 0) | ||
87 | ; | ||
88 | outb(com_port, c); | ||
89 | } | ||
90 | |||
91 | unsigned char | ||
92 | serial_getc(unsigned long com_port) | ||
93 | { | ||
94 | while ((inb(com_port + (UART_LSR << shift)) & UART_LSR_DR) == 0) | ||
95 | ; | ||
96 | return inb(com_port); | ||
97 | } | ||
98 | |||
99 | int | ||
100 | serial_tstc(unsigned long com_port) | ||
101 | { | ||
102 | return ((inb(com_port + (UART_LSR << shift)) & UART_LSR_DR) != 0); | ||
103 | } | ||