1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Driver for CPM (SCC/SMC) serial ports 4 * 5 * Copyright (C) 2004 Freescale Semiconductor, Inc. 6 * 7 * 2006 (c) MontaVista Software, Inc. 8 * Vitaly Bordug <vbordug@ru.mvista.com> 9 */ 10 #ifndef CPM_UART_H 11 #define CPM_UART_H 12 13 #include <linux/platform_device.h> 14 15 struct gpio_desc; 16 17 #if defined(CONFIG_CPM2) 18 #include "asm/cpm2.h" 19 #elif defined(CONFIG_CPM1) 20 #include "asm/cpm1.h" 21 #endif 22 23 #define DPRAM_BASE ((u8 __iomem *)cpm_muram_addr(0)) 24 25 #define SERIAL_CPM_MAJOR 204 26 #define SERIAL_CPM_MINOR 46 27 28 #define IS_SMC(pinfo) (pinfo->flags & FLAG_SMC) 29 #define FLAG_SMC 0x00000002 30 #define FLAG_CONSOLE 0x00000001 31 32 #define UART_NR 6 33 34 #define RX_NUM_FIFO 4 35 #define RX_BUF_SIZE 32 36 #define TX_NUM_FIFO 4 37 #define TX_BUF_SIZE 32 38 39 #define GPIO_CTS 0 40 #define GPIO_RTS 1 41 #define GPIO_DCD 2 42 #define GPIO_DSR 3 43 #define GPIO_DTR 4 44 #define GPIO_RI 5 45 46 #define NUM_GPIOS (GPIO_RI+1) 47 48 struct uart_cpm_port { 49 struct uart_port port; 50 u16 rx_nrfifos; 51 u16 rx_fifosize; 52 u16 tx_nrfifos; 53 u16 tx_fifosize; 54 smc_t __iomem *smcp; 55 smc_uart_t __iomem *smcup; 56 scc_t __iomem *sccp; 57 scc_uart_t __iomem *sccup; 58 cbd_t __iomem *rx_bd_base; 59 cbd_t __iomem *rx_cur; 60 cbd_t __iomem *tx_bd_base; 61 cbd_t __iomem *tx_cur; 62 unsigned char *tx_buf; 63 unsigned char *rx_buf; 64 u32 flags; 65 struct clk *clk; 66 u8 brg; 67 uint dp_addr; 68 void *mem_addr; 69 dma_addr_t dma_addr; 70 u32 mem_size; 71 /* wait on close if needed */ 72 int wait_closing; 73 /* value to combine with opcode to form cpm command */ 74 u32 command; 75 struct gpio_desc *gpios[NUM_GPIOS]; 76 }; 77 78 /* 79 virtual to phys transtalion 80 */ 81 static inline unsigned long cpu2cpm_addr(void *addr, 82 struct uart_cpm_port *pinfo) 83 { 84 int offset; 85 u32 val = (u32)addr; 86 u32 mem = (u32)pinfo->mem_addr; 87 /* sane check */ 88 if (likely(val >= mem && val < mem + pinfo->mem_size)) { 89 offset = val - mem; 90 return pinfo->dma_addr + offset; 91 } 92 /* something nasty happened */ 93 BUG(); 94 return 0; 95 } 96 97 static inline void *cpm2cpu_addr(unsigned long addr, 98 struct uart_cpm_port *pinfo) 99 { 100 int offset; 101 u32 val = addr; 102 u32 dma = (u32)pinfo->dma_addr; 103 /* sane check */ 104 if (likely(val >= dma && val < dma + pinfo->mem_size)) { 105 offset = val - dma; 106 return pinfo->mem_addr + offset; 107 } 108 /* something nasty happened */ 109 BUG(); 110 return NULL; 111 } 112 113 114 #endif /* CPM_UART_H */ 115