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 __iomem *smcp;
60 smc_uart_t __iomem *smcup;
61 scc_t __iomem *sccp;
62 scc_uart_t __iomem *sccup;
63 cbd_t __iomem *rx_bd_base;
64 cbd_t __iomem *rx_cur;
65 cbd_t __iomem *tx_bd_base;
66 cbd_t __iomem *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 /* value to combine with opcode to form cpm command */
84 u32 command;
85};
86
87#ifndef CONFIG_PPC_CPM_NEW_BINDING
88extern int cpm_uart_port_map[UART_NR];
89#endif
90extern int cpm_uart_nr;
91extern struct uart_cpm_port cpm_uart_ports[UART_NR];
92
93/* these are located in their respective files */
94void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd);
95void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
96 struct device_node *np);
97void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram);
98int cpm_uart_init_portdesc(void);
99int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con);
100void cpm_uart_freebuf(struct uart_cpm_port *pinfo);
101
102void smc1_lineif(struct uart_cpm_port *pinfo);
103void smc2_lineif(struct uart_cpm_port *pinfo);
104void scc1_lineif(struct uart_cpm_port *pinfo);
105void scc2_lineif(struct uart_cpm_port *pinfo);
106void scc3_lineif(struct uart_cpm_port *pinfo);
107void scc4_lineif(struct uart_cpm_port *pinfo);
108
109/*
110 virtual to phys transtalion
111*/
112static inline unsigned long cpu2cpm_addr(void *addr,
113 struct uart_cpm_port *pinfo)
114{
115 int offset;
116 u32 val = (u32)addr;
117 u32 mem = (u32)pinfo->mem_addr;
118 /* sane check */
119 if (likely(val >= mem && val < mem + pinfo->mem_size)) {
120 offset = val - mem;
121 return pinfo->dma_addr + offset;
122 }
123 /* something nasty happened */
124 BUG();
125 return 0;
126}
127
128static inline void *cpm2cpu_addr(unsigned long addr,
129 struct uart_cpm_port *pinfo)
130{
131 int offset;
132 u32 val = addr;
133 u32 dma = (u32)pinfo->dma_addr;
134 /* sane check */
135 if (likely(val >= dma && val < dma + pinfo->mem_size)) {
136 offset = val - dma;
137 return pinfo->mem_addr + offset;
138 }
139 /* something nasty happened */
140 BUG();
141 return NULL;
142}
143
144
145#endif /* CPM_UART_H */