summaryrefslogtreecommitdiffstats
path: root/drivers/serial/cpm_uart/cpm_uart.h
blob: 32b9737759c45fdd3045cba8db1318d4d711ed86 (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
/*
 *  linux/drivers/serial/cpm_uart.h
 *
 *  Driver for CPM (SCC/SMC) serial ports
 *
 *  Copyright (C) 2004 Freescale Semiconductor, Inc.
 *
 *  2006 (c) MontaVista Software, Inc.
 * 	Vitaly Bordug <vbordug@ru.mvista.com>
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 *
 */
#ifndef CPM_UART_H
#define CPM_UART_H

#include <linux/platform_device.h>
#include <linux/fs_uart_pd.h>

#if defined(CONFIG_CPM2)
#include "cpm_uart_cpm2.h"
#elif defined(CONFIG_8xx)
#include "cpm_uart_cpm1.h"
#endif

#define SERIAL_CPM_MAJOR	204
#define SERIAL_CPM_MINOR	46

#define IS_SMC(pinfo) 		(pinfo->flags & FLAG_SMC)
#define IS_DISCARDING(pinfo)	(pinfo->flags & FLAG_DISCARDING)
#define FLAG_DISCARDING	0x00000004	/* when set, don't discard */
#define FLAG_SMC	0x00000002
#define FLAG_CONSOLE	0x00000001

#define UART_SMC1	fsid_smc1_uart
#define UART_SMC2	fsid_smc2_uart
#define UART_SCC1	fsid_scc1_uart
#define UART_SCC2	fsid_scc2_uart
#define UART_SCC3	fsid_scc3_uart
#define UART_SCC4	fsid_scc4_uart

#define UART_NR		fs_uart_nr

#define RX_NUM_FIFO	4
#define RX_BUF_SIZE	32
#define TX_NUM_FIFO	4
#define TX_BUF_SIZE	32

#define SCC_WAIT_CLOSING 100

struct uart_cpm_port {
	struct uart_port	port;
	u16			rx_nrfifos;
	u16			rx_fifosize;
	u16			tx_nrfifos;
	u16			tx_fifosize;
	smc_t __iomem		*smcp;
	smc_uart_t __iomem	*smcup;
	scc_t __iomem		*sccp;
	scc_uart_t __iomem	*sccup;
	cbd_t __iomem		*rx_bd_base;
	cbd_t __iomem		*rx_cur;
	cbd_t __iomem		*tx_bd_base;
	cbd_t __iomem		*tx_cur;
	unsigned char		*tx_buf;
	unsigned char		*rx_buf;
	u32			flags;
	void			(*set_lineif)(struct uart_cpm_port *);
	u8			brg;
	uint			 dp_addr;
	void 			*mem_addr;
	dma_addr_t		 dma_addr;
	u32			mem_size;
	/* helpers */
	int			 baud;
	int			 bits;
	/* Keep track of 'odd' SMC2 wirings */
	int			is_portb;
	/* wait on close if needed */
	int 			wait_closing;
	/* value to combine with opcode to form cpm command */
	u32			command;
};

#ifndef CONFIG_PPC_CPM_NEW_BINDING
extern int cpm_uart_port_map[UART_NR];
#endif
extern int cpm_uart_nr;
extern struct uart_cpm_port cpm_uart_ports[UART_NR];

/* these are located in their respective files */
void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd);
int cpm_uart_init_portdesc(void);
int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con);
void cpm_uart_freebuf(struct uart_cpm_port *pinfo);

void smc1_lineif(struct uart_cpm_port *pinfo);
void smc2_lineif(struct uart_cpm_port *pinfo);
void scc1_lineif(struct uart_cpm_port *pinfo);
void scc2_lineif(struct uart_cpm_port *pinfo);
void scc3_lineif(struct uart_cpm_port *pinfo);
void scc4_lineif(struct uart_cpm_port *pinfo);

/*
   virtual to phys transtalion
*/
static inline unsigned long cpu2cpm_addr(void *addr,
                                         struct uart_cpm_port *pinfo)
{
	int offset;
	u32 val = (u32)addr;
	u32 mem = (u32)pinfo->mem_addr;
	/* sane check */
	if (likely(val >= mem && val < mem + pinfo->mem_size)) {
		offset = val - mem;
		return pinfo->dma_addr + offset;
	}
	/* something nasty happened */
	BUG();
	return 0;
}

static inline void *cpm2cpu_addr(unsigned long addr,
                                 struct uart_cpm_port *pinfo)
{
	int offset;
	u32 val = addr;
	u32 dma = (u32)pinfo->dma_addr;
	/* sane check */
	if (likely(val >= dma && val < dma + pinfo->mem_size)) {
		offset = val - dma;
		return pinfo->mem_addr + offset;
	}
	/* something nasty happened */
	BUG();
	return NULL;
}


#endif /* CPM_UART_H */