drivers/tty/serial/cpm_uart/cpm_uart.h

   1 /*
   2  *  Driver for CPM (SCC/SMC) serial ports
   3  *
   4  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
   5  *
   6  *  2006 (c) MontaVista Software, Inc.
   7  *      Vitaly Bordug <vbordug@ru.mvista.com>
   8  *
   9  * This file is licensed under the terms of the GNU General Public License
  10  * version 2. This program is licensed "as is" without any warranty of any
  11  * kind, whether express or implied.
  12  *
  13  */
  14 #ifndef CPM_UART_H
  15 #define CPM_UART_H
  16
  17 #include <linux/platform_device.h>
  18 #include <linux/fs_uart_pd.h>
  19
  20 #if defined(CONFIG_CPM2)
  21 #include "cpm_uart_cpm2.h"
  22 #elif defined(CONFIG_8xx)
  23 #include "cpm_uart_cpm1.h"
  24 #endif
  25
  26 #define SERIAL_CPM_MAJOR        204
  27 #define SERIAL_CPM_MINOR        46
  28
  29 #define IS_SMC(pinfo)           (pinfo->flags & FLAG_SMC)
  30 #define IS_DISCARDING(pinfo)    (pinfo->flags & FLAG_DISCARDING)
  31 #define FLAG_DISCARDING 0x00000004      /* when set, don't discard */
  32 #define FLAG_SMC        0x00000002
  33 #define FLAG_CONSOLE    0x00000001
  34
  35 #define UART_SMC1       fsid_smc1_uart
  36 #define UART_SMC2       fsid_smc2_uart
  37 #define UART_SCC1       fsid_scc1_uart
  38 #define UART_SCC2       fsid_scc2_uart
  39 #define UART_SCC3       fsid_scc3_uart
  40 #define UART_SCC4       fsid_scc4_uart
  41
  42 #define UART_NR         fs_uart_nr
  43
  44 #define RX_NUM_FIFO     4
  45 #define RX_BUF_SIZE     32
  46 #define TX_NUM_FIFO     4
  47 #define TX_BUF_SIZE     32
  48
  49 #define SCC_WAIT_CLOSING 100
  50
  51 #define GPIO_CTS        0
  52 #define GPIO_RTS        1
  53 #define GPIO_DCD        2
  54 #define GPIO_DSR        3
  55 #define GPIO_DTR        4
  56 #define GPIO_RI         5
  57
  58 #define NUM_GPIOS       (GPIO_RI+1)
  59
  60 struct uart_cpm_port {
  61         struct uart_port        port;
  62         u16                     rx_nrfifos;
  63         u16                     rx_fifosize;
  64         u16                     tx_nrfifos;
  65         u16                     tx_fifosize;
  66         smc_t __iomem           *smcp;
  67         smc_uart_t __iomem      *smcup;
  68         scc_t __iomem           *sccp;
  69         scc_uart_t __iomem      *sccup;
  70         cbd_t __iomem           *rx_bd_base;
  71         cbd_t __iomem           *rx_cur;
  72         cbd_t __iomem           *tx_bd_base;
  73         cbd_t __iomem           *tx_cur;
  74         unsigned char           *tx_buf;
  75         unsigned char           *rx_buf;
  76         u32                     flags;
  77         struct clk              *clk;
  78         u8                      brg;
  79         uint                     dp_addr;
  80         void                    *mem_addr;
  81         dma_addr_t               dma_addr;
  82         u32                     mem_size;
  83         /* wait on close if needed */
  84         int                     wait_closing;
  85         /* value to combine with opcode to form cpm command */
  86         u32                     command;
  87         int                     gpios[NUM_GPIOS];
  88 };
  89
  90 extern int cpm_uart_nr;
  91 extern struct uart_cpm_port cpm_uart_ports[UART_NR];
  92
  93 /* these are located in their respective files */
  94 void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd);
  95 void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
  96                                 struct device_node *np);
  97 void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram);
  98 int cpm_uart_init_portdesc(void);
  99 int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con);
 100 void cpm_uart_freebuf(struct uart_cpm_port *pinfo);
 101
 102 void smc1_lineif(struct uart_cpm_port *pinfo);
 103 void smc2_lineif(struct uart_cpm_port *pinfo);
 104 void scc1_lineif(struct uart_cpm_port *pinfo);
 105 void scc2_lineif(struct uart_cpm_port *pinfo);
 106 void scc3_lineif(struct uart_cpm_port *pinfo);
 107 void scc4_lineif(struct uart_cpm_port *pinfo);
 108
 109 /*
 110    virtual to phys transtalion
 111 */
 112 static 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
 128 static 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 */