/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  Driver for CPM (SCC/SMC) serial ports
 *
 *  Copyright (C) 2004 Freescale Semiconductor, Inc.
 *
 *  2006 (c) MontaVista Software, Inc.
 *      Vitaly Bordug <vbordug@ru.mvista.com>
 */
#ifndef CPM_UART_H
#define CPM_UART_H

#include <linux/platform_device.h>

struct gpio_desc;

#if defined(CONFIG_CPM2)
#include "asm/cpm2.h"
#elif defined(CONFIG_CPM1)
#include "asm/cpm1.h"
#endif

#define DPRAM_BASE      ((u8 __iomem *)cpm_muram_addr(0))

#define SERIAL_CPM_MAJOR        204
#define SERIAL_CPM_MINOR        46

#define IS_SMC(pinfo)           (pinfo->flags & FLAG_SMC)
#define FLAG_SMC        0x00000002
#define FLAG_CONSOLE    0x00000001

#define UART_NR         6

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

#define GPIO_CTS        0
#define GPIO_RTS        1
#define GPIO_DCD        2
#define GPIO_DSR        3
#define GPIO_DTR        4
#define GPIO_RI         5

#define NUM_GPIOS       (GPIO_RI+1)

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;
        struct clk              *clk;
        u8                      brg;
        uint                     dp_addr;
        void                    *mem_addr;
        dma_addr_t               dma_addr;
        u32                     mem_size;
        /* wait on close if needed */
        int                     wait_closing;
        /* value to combine with opcode to form cpm command */
        u32                     command;
        struct gpio_desc        *gpios[NUM_GPIOS];
};

/*
   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 */