mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-19 18:09:05 +00:00
09b03b6c29
Current address translation methods can produce wrong results, because virt_to_bus and vice versa may not produce correct offsets on dma-allocated memory. The right way is, while tracking both phys and virt address of the window that has been allocated for boffer descriptors, and use those numbers to compute the offset and make translation properly. Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
128 lines
3.1 KiB
C
128 lines
3.1 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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*/
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#ifndef CPM_UART_H
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#define CPM_UART_H
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#include <linux/config.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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};
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extern int cpm_uart_port_map[UART_NR];
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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(int line, 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 ((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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printk("%s(): address %x to translate out of range!\n", __FUNCTION__, val);
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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 ((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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printk("%s(): address %x to translate out of range!\n", __FUNCTION__, val);
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return 0;
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}
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#endif /* CPM_UART_H */
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