1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Driver for CPM (SCC/SMC) serial ports
5 * Copyright (C) 2004 Freescale Semiconductor, Inc.
7 * 2006 (c) MontaVista Software, Inc.
8 * Vitaly Bordug <vbordug@ru.mvista.com>
13 #include <linux/platform_device.h>
14 #include <linux/fs_uart_pd.h>
18 #if defined(CONFIG_CPM2)
19 #include "cpm_uart_cpm2.h"
20 #elif defined(CONFIG_CPM1)
21 #include "cpm_uart_cpm1.h"
22 #elif defined(CONFIG_COMPILE_TEST)
23 #include "cpm_uart_cpm2.h"
26 #define SERIAL_CPM_MAJOR 204
27 #define SERIAL_CPM_MINOR 46
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
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
42 #define UART_NR fs_uart_nr
45 #define RX_BUF_SIZE 32
47 #define TX_BUF_SIZE 32
49 #define SCC_WAIT_CLOSING 100
58 #define NUM_GPIOS (GPIO_RI+1)
60 struct uart_cpm_port {
61 struct uart_port port;
67 smc_uart_t __iomem *smcup;
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;
83 /* wait on close if needed */
85 /* value to combine with opcode to form cpm command */
87 struct gpio_desc *gpios[NUM_GPIOS];
90 extern struct uart_cpm_port cpm_uart_ports[UART_NR];
92 /* these are located in their respective files */
93 void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd);
94 void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
95 struct device_node *np);
96 void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram);
97 int cpm_uart_init_portdesc(void);
98 int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con);
99 void cpm_uart_freebuf(struct uart_cpm_port *pinfo);
101 void smc1_lineif(struct uart_cpm_port *pinfo);
102 void smc2_lineif(struct uart_cpm_port *pinfo);
103 void scc1_lineif(struct uart_cpm_port *pinfo);
104 void scc2_lineif(struct uart_cpm_port *pinfo);
105 void scc3_lineif(struct uart_cpm_port *pinfo);
106 void scc4_lineif(struct uart_cpm_port *pinfo);
109 virtual to phys transtalion
111 static inline unsigned long cpu2cpm_addr(void *addr,
112 struct uart_cpm_port *pinfo)
116 u32 mem = (u32)pinfo->mem_addr;
118 if (likely(val >= mem && val < mem + pinfo->mem_size)) {
120 return pinfo->dma_addr + offset;
122 /* something nasty happened */
127 static inline void *cpm2cpu_addr(unsigned long addr,
128 struct uart_cpm_port *pinfo)
132 u32 dma = (u32)pinfo->dma_addr;
134 if (likely(val >= dma && val < dma + pinfo->mem_size)) {
136 return pinfo->mem_addr + offset;
138 /* something nasty happened */
144 #endif /* CPM_UART_H */