tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/drivers/serial/cpm_uart.h
3 *
4 * Driver for CPM (SCC/SMC) serial ports
5 *
6 * Copyright (C) 2004 Freescale Semiconductor, Inc.
7 *
8 * 2006 (c) MontaVista Software, Inc.
9 * Vitaly Bordug <vbordug@ru.mvista.com>
10 *
11 * This file is licensed under the terms of the GNU General Public License
12 * version 2. This program is licensed "as is" without any warranty of any
13 * kind, whether express or implied.
14 *
15 */
16#ifndef CPM_UART_H
17#define CPM_UART_H
18
19#include <linux/platform_device.h>
20#include <linux/fs_uart_pd.h>
21
22#if defined(CONFIG_CPM2)
23#include "cpm_uart_cpm2.h"
24#elif defined(CONFIG_8xx)
25#include "cpm_uart_cpm1.h"
26#endif
27
28#define SERIAL_CPM_MAJOR 204
29#define SERIAL_CPM_MINOR 46
30
31#define IS_SMC(pinfo) (pinfo->flags & FLAG_SMC)
32#define IS_DISCARDING(pinfo) (pinfo->flags & FLAG_DISCARDING)
33#define FLAG_DISCARDING 0x00000004 /* when set, don't discard */
34#define FLAG_SMC 0x00000002
35#define FLAG_CONSOLE 0x00000001
36
37#define UART_SMC1 fsid_smc1_uart
38#define UART_SMC2 fsid_smc2_uart
39#define UART_SCC1 fsid_scc1_uart
40#define UART_SCC2 fsid_scc2_uart
41#define UART_SCC3 fsid_scc3_uart
42#define UART_SCC4 fsid_scc4_uart
43
44#define UART_NR fs_uart_nr
45
46#define RX_NUM_FIFO 4
47#define RX_BUF_SIZE 32
48#define TX_NUM_FIFO 4
49#define TX_BUF_SIZE 32
50
51#define SCC_WAIT_CLOSING 100
52
53struct uart_cpm_port {
54 struct uart_port port;
55 u16 rx_nrfifos;
56 u16 rx_fifosize;
57 u16 tx_nrfifos;
58 u16 tx_fifosize;
59 smc_t *smcp;
60 smc_uart_t *smcup;
61 scc_t *sccp;
62 scc_uart_t *sccup;
63 volatile cbd_t *rx_bd_base;
64 volatile cbd_t *rx_cur;
65 volatile cbd_t *tx_bd_base;
66 volatile cbd_t *tx_cur;
67 unsigned char *tx_buf;
68 unsigned char *rx_buf;
69 u32 flags;
70 void (*set_lineif)(struct uart_cpm_port *);
71 u8 brg;
72 uint dp_addr;
73 void *mem_addr;
74 dma_addr_t dma_addr;
75 u32 mem_size;
76 /* helpers */
77 int baud;
78 int bits;
79 /* Keep track of 'odd' SMC2 wirings */
80 int is_portb;
81 /* wait on close if needed */
82 int wait_closing;
83};
84
85extern int cpm_uart_port_map[UART_NR];
86extern int cpm_uart_nr;
87extern struct uart_cpm_port cpm_uart_ports[UART_NR];
88
89/* these are located in their respective files */
90void cpm_line_cr_cmd(int line, int cmd);
91int __init cpm_uart_init_portdesc(void);
92int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con);
93void cpm_uart_freebuf(struct uart_cpm_port *pinfo);
94
95void smc1_lineif(struct uart_cpm_port *pinfo);
96void smc2_lineif(struct uart_cpm_port *pinfo);
97void scc1_lineif(struct uart_cpm_port *pinfo);
98void scc2_lineif(struct uart_cpm_port *pinfo);
99void scc3_lineif(struct uart_cpm_port *pinfo);
100void scc4_lineif(struct uart_cpm_port *pinfo);
101
102/*
103 virtual to phys transtalion
104*/
105static inline unsigned long cpu2cpm_addr(void* addr, struct uart_cpm_port *pinfo)
106{
107 int offset;
108 u32 val = (u32)addr;
109 /* sane check */
110 if (likely((val >= (u32)pinfo->mem_addr)) &&
111 (val<((u32)pinfo->mem_addr + pinfo->mem_size))) {
112 offset = val - (u32)pinfo->mem_addr;
113 return pinfo->dma_addr+offset;
114 }
115 /* something nasty happened */
116 BUG();
117 return 0;
118}
119
120static inline void *cpm2cpu_addr(unsigned long addr, struct uart_cpm_port *pinfo)
121{
122 int offset;
123 u32 val = addr;
124 /* sane check */
125 if (likely((val >= pinfo->dma_addr) &&
126 (val<(pinfo->dma_addr + pinfo->mem_size)))) {
127 offset = val - (u32)pinfo->dma_addr;
128 return (void*)(pinfo->mem_addr+offset);
129 }
130 /* something nasty happened */
131 BUG();
132 return 0;
133}
134
135
136#endif /* CPM_UART_H */