drivers/serial/cpm_uart/cpm_uart.h

   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/config.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/fs_uart_pd.h>
  22
  23 #if defined(CONFIG_CPM2)
  24 #include "cpm_uart_cpm2.h"
  25 #elif defined(CONFIG_8xx)
  26 #include "cpm_uart_cpm1.h"
  27 #endif
  28
  29 #define SERIAL_CPM_MAJOR        204
  30 #define SERIAL_CPM_MINOR        46
  31
  32 #define IS_SMC(pinfo)           (pinfo->flags & FLAG_SMC)
  33 #define IS_DISCARDING(pinfo)    (pinfo->flags & FLAG_DISCARDING)
  34 #define FLAG_DISCARDING 0x00000004      /* when set, don't discard */
  35 #define FLAG_SMC        0x00000002
  36 #define FLAG_CONSOLE    0x00000001
  37
  38 #define UART_SMC1       fsid_smc1_uart
  39 #define UART_SMC2       fsid_smc2_uart
  40 #define UART_SCC1       fsid_scc1_uart
  41 #define UART_SCC2       fsid_scc2_uart
  42 #define UART_SCC3       fsid_scc3_uart
  43 #define UART_SCC4       fsid_scc4_uart
  44
  45 #define UART_NR         fs_uart_nr
  46
  47 #define RX_NUM_FIFO     4
  48 #define RX_BUF_SIZE     32
  49 #define TX_NUM_FIFO     4
  50 #define TX_BUF_SIZE     32
  51
  52 #define SCC_WAIT_CLOSING 100
  53
  54 struct uart_cpm_port {
  55         struct uart_port        port;
  56         u16                     rx_nrfifos;
  57         u16                     rx_fifosize;
  58         u16                     tx_nrfifos;
  59         u16                     tx_fifosize;
  60         smc_t                   *smcp;
  61         smc_uart_t              *smcup;
  62         scc_t                   *sccp;
  63         scc_uart_t              *sccup;
  64         volatile cbd_t          *rx_bd_base;
  65         volatile cbd_t          *rx_cur;
  66         volatile cbd_t          *tx_bd_base;
  67         volatile cbd_t          *tx_cur;
  68         unsigned char           *tx_buf;
  69         unsigned char           *rx_buf;
  70         u32                     flags;
  71         void                    (*set_lineif)(struct uart_cpm_port *);
  72         u8                      brg;
  73         uint                     dp_addr;
  74         void                    *mem_addr;
  75         dma_addr_t               dma_addr;
  76         u32                     mem_size;
  77         /* helpers */
  78         int                      baud;
  79         int                      bits;
  80         /* Keep track of 'odd' SMC2 wirings */
  81         int                     is_portb;
  82         /* wait on close if needed */
  83         int                     wait_closing;
  84 };
  85
  86 extern int cpm_uart_port_map[UART_NR];
  87 extern int cpm_uart_nr;
  88 extern struct uart_cpm_port cpm_uart_ports[UART_NR];
  89
  90 /* these are located in their respective files */
  91 void cpm_line_cr_cmd(int line, int cmd);
  92 int cpm_uart_init_portdesc(void);
  93 int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con);
  94 void cpm_uart_freebuf(struct uart_cpm_port *pinfo);
  95
  96 void smc1_lineif(struct uart_cpm_port *pinfo);
  97 void smc2_lineif(struct uart_cpm_port *pinfo);
  98 void scc1_lineif(struct uart_cpm_port *pinfo);
  99 void scc2_lineif(struct uart_cpm_port *pinfo);
 100 void scc3_lineif(struct uart_cpm_port *pinfo);
 101 void scc4_lineif(struct uart_cpm_port *pinfo);
 102
 103 /*
 104    virtual to phys transtalion
 105 */
 106 static inline unsigned long cpu2cpm_addr(void* addr, struct uart_cpm_port *pinfo)
 107 {
 108         int offset;
 109         u32 val = (u32)addr;
 110         /* sane check */
 111         if (likely((val >= (u32)pinfo->mem_addr)) &&
 112                         (val<((u32)pinfo->mem_addr + pinfo->mem_size))) {
 113                 offset = val - (u32)pinfo->mem_addr;
 114                 return pinfo->dma_addr+offset;
 115         }
 116         /* something nasty happened */
 117         BUG();
 118         return 0;
 119 }
 120
 121 static inline void *cpm2cpu_addr(unsigned long addr, struct uart_cpm_port *pinfo)
 122 {
 123         int offset;
 124         u32 val = addr;
 125         /* sane check */
 126         if (likely((val >= pinfo->dma_addr) &&
 127                         (val<(pinfo->dma_addr + pinfo->mem_size)))) {
 128                 offset = val - (u32)pinfo->dma_addr;
 129                 return (void*)(pinfo->mem_addr+offset);
 130         }
 131         /* something nasty happened */
 132         BUG();
 133         return 0;
 134 }
 135
 136
 137 #endif /* CPM_UART_H */