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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | /* 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 */ |