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7ae870368d
The existing OF glue code was crufty and broken. Rather than fix it, it has been removed, and the serial driver now talks to the device tree directly. The non-CONFIG_PPC_CPM_NEW_BINDING code can go away once CPM platforms are dropped from arch/ppc (which will hopefully be soon), and existing arch/powerpc boards that I wasn't able to test on for this patchset get converted (which should be even sooner). Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
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* linux/drivers/serial/cpm_uart.h
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*
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* Driver for CPM (SCC/SMC) serial ports
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*
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* Copyright (C) 2004 Freescale Semiconductor, Inc.
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*
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* 2006 (c) MontaVista Software, Inc.
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* Vitaly Bordug <vbordug@ru.mvista.com>
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*
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*/
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#ifndef CPM_UART_H
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#define CPM_UART_H
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#include <linux/platform_device.h>
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#include <linux/fs_uart_pd.h>
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#if defined(CONFIG_CPM2)
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#include "cpm_uart_cpm2.h"
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#elif defined(CONFIG_8xx)
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#include "cpm_uart_cpm1.h"
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#endif
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#define SERIAL_CPM_MAJOR 204
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#define SERIAL_CPM_MINOR 46
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#define IS_SMC(pinfo) (pinfo->flags & FLAG_SMC)
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#define IS_DISCARDING(pinfo) (pinfo->flags & FLAG_DISCARDING)
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#define FLAG_DISCARDING 0x00000004 /* when set, don't discard */
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#define FLAG_SMC 0x00000002
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#define FLAG_CONSOLE 0x00000001
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#define UART_SMC1 fsid_smc1_uart
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#define UART_SMC2 fsid_smc2_uart
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#define UART_SCC1 fsid_scc1_uart
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#define UART_SCC2 fsid_scc2_uart
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#define UART_SCC3 fsid_scc3_uart
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#define UART_SCC4 fsid_scc4_uart
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#define UART_NR fs_uart_nr
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#define RX_NUM_FIFO 4
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#define RX_BUF_SIZE 32
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#define TX_NUM_FIFO 4
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#define TX_BUF_SIZE 32
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#define SCC_WAIT_CLOSING 100
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struct uart_cpm_port {
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struct uart_port port;
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u16 rx_nrfifos;
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u16 rx_fifosize;
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u16 tx_nrfifos;
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u16 tx_fifosize;
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smc_t *smcp;
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smc_uart_t *smcup;
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scc_t *sccp;
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scc_uart_t *sccup;
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volatile cbd_t *rx_bd_base;
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volatile cbd_t *rx_cur;
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volatile cbd_t *tx_bd_base;
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volatile cbd_t *tx_cur;
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unsigned char *tx_buf;
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unsigned char *rx_buf;
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u32 flags;
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void (*set_lineif)(struct uart_cpm_port *);
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u8 brg;
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uint dp_addr;
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void *mem_addr;
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dma_addr_t dma_addr;
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u32 mem_size;
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/* helpers */
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int baud;
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int bits;
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/* Keep track of 'odd' SMC2 wirings */
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int is_portb;
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/* wait on close if needed */
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int wait_closing;
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/* value to combine with opcode to form cpm command */
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u32 command;
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};
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#ifndef CONFIG_PPC_CPM_NEW_BINDING
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extern int cpm_uart_port_map[UART_NR];
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#endif
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extern int cpm_uart_nr;
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extern struct uart_cpm_port cpm_uart_ports[UART_NR];
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/* these are located in their respective files */
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void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd);
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int cpm_uart_init_portdesc(void);
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int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con);
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void cpm_uart_freebuf(struct uart_cpm_port *pinfo);
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void smc1_lineif(struct uart_cpm_port *pinfo);
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void smc2_lineif(struct uart_cpm_port *pinfo);
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void scc1_lineif(struct uart_cpm_port *pinfo);
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void scc2_lineif(struct uart_cpm_port *pinfo);
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void scc3_lineif(struct uart_cpm_port *pinfo);
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void scc4_lineif(struct uart_cpm_port *pinfo);
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/*
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virtual to phys transtalion
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*/
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static inline unsigned long cpu2cpm_addr(void* addr, struct uart_cpm_port *pinfo)
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{
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int offset;
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u32 val = (u32)addr;
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/* sane check */
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if (likely((val >= (u32)pinfo->mem_addr)) &&
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(val<((u32)pinfo->mem_addr + pinfo->mem_size))) {
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offset = val - (u32)pinfo->mem_addr;
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return pinfo->dma_addr+offset;
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}
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/* something nasty happened */
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BUG();
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return 0;
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}
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static inline void *cpm2cpu_addr(unsigned long addr, struct uart_cpm_port *pinfo)
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{
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int offset;
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u32 val = addr;
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/* sane check */
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if (likely((val >= pinfo->dma_addr) &&
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(val<(pinfo->dma_addr + pinfo->mem_size)))) {
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offset = val - (u32)pinfo->dma_addr;
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return (void*)(pinfo->mem_addr+offset);
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}
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/* something nasty happened */
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BUG();
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return 0;
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}
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#endif /* CPM_UART_H */
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