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mpsc.h
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mpsc.h
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/*
* drivers/serial/mpsc.h
*
* Author: Mark A. Greer <[email protected]>
*
* 2004 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#ifndef __MPSC_H__
#define __MPSC_H__
#include <linux/config.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/sysrq.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/mv643xx.h>
#include <asm/io.h>
#include <asm/irq.h>
#if defined(CONFIG_SERIAL_MPSC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
#define MPSC_NUM_CTLRS 2
/*
* Descriptors and buffers must be cache line aligned.
* Buffers lengths must be multiple of cache line size.
* Number of Tx & Rx descriptors must be powers of 2.
*/
#define MPSC_RXR_ENTRIES 32
#define MPSC_RXRE_SIZE dma_get_cache_alignment()
#define MPSC_RXR_SIZE (MPSC_RXR_ENTRIES * MPSC_RXRE_SIZE)
#define MPSC_RXBE_SIZE dma_get_cache_alignment()
#define MPSC_RXB_SIZE (MPSC_RXR_ENTRIES * MPSC_RXBE_SIZE)
#define MPSC_TXR_ENTRIES 32
#define MPSC_TXRE_SIZE dma_get_cache_alignment()
#define MPSC_TXR_SIZE (MPSC_TXR_ENTRIES * MPSC_TXRE_SIZE)
#define MPSC_TXBE_SIZE dma_get_cache_alignment()
#define MPSC_TXB_SIZE (MPSC_TXR_ENTRIES * MPSC_TXBE_SIZE)
#define MPSC_DMA_ALLOC_SIZE (MPSC_RXR_SIZE + MPSC_RXB_SIZE + \
MPSC_TXR_SIZE + MPSC_TXB_SIZE + \
dma_get_cache_alignment() /* for alignment */)
/* Rx and Tx Ring entry descriptors -- assume entry size is <= cacheline size */
struct mpsc_rx_desc {
u16 bufsize;
u16 bytecnt;
u32 cmdstat;
u32 link;
u32 buf_ptr;
} __attribute((packed));
struct mpsc_tx_desc {
u16 bytecnt;
u16 shadow;
u32 cmdstat;
u32 link;
u32 buf_ptr;
} __attribute((packed));
/*
* Some regs that have the erratum that you can't read them are are shared
* between the two MPSC controllers. This struct contains those shared regs.
*/
struct mpsc_shared_regs {
phys_addr_t mpsc_routing_base_p;
phys_addr_t sdma_intr_base_p;
void __iomem *mpsc_routing_base;
void __iomem *sdma_intr_base;
u32 MPSC_MRR_m;
u32 MPSC_RCRR_m;
u32 MPSC_TCRR_m;
u32 SDMA_INTR_CAUSE_m;
u32 SDMA_INTR_MASK_m;
};
/* The main driver data structure */
struct mpsc_port_info {
struct uart_port port; /* Overlay uart_port structure */
/* Internal driver state for this ctlr */
u8 ready;
u8 rcv_data;
tcflag_t c_iflag; /* save termios->c_iflag */
tcflag_t c_cflag; /* save termios->c_cflag */
/* Info passed in from platform */
u8 mirror_regs; /* Need to mirror regs? */
u8 cache_mgmt; /* Need manual cache mgmt? */
u8 brg_can_tune; /* BRG has baud tuning? */
u32 brg_clk_src;
u16 mpsc_max_idle;
int default_baud;
int default_bits;
int default_parity;
int default_flow;
/* Physical addresses of various blocks of registers (from platform) */
phys_addr_t mpsc_base_p;
phys_addr_t sdma_base_p;
phys_addr_t brg_base_p;
/* Virtual addresses of various blocks of registers (from platform) */
void __iomem *mpsc_base;
void __iomem *sdma_base;
void __iomem *brg_base;
/* Descriptor ring and buffer allocations */
void *dma_region;
dma_addr_t dma_region_p;
dma_addr_t rxr; /* Rx descriptor ring */
dma_addr_t rxr_p; /* Phys addr of rxr */
u8 *rxb; /* Rx Ring I/O buf */
u8 *rxb_p; /* Phys addr of rxb */
u32 rxr_posn; /* First desc w/ Rx data */
dma_addr_t txr; /* Tx descriptor ring */
dma_addr_t txr_p; /* Phys addr of txr */
u8 *txb; /* Tx Ring I/O buf */
u8 *txb_p; /* Phys addr of txb */
int txr_head; /* Where new data goes */
int txr_tail; /* Where sent data comes off */
/* Mirrored values of regs we can't read (if 'mirror_regs' set) */
u32 MPSC_MPCR_m;
u32 MPSC_CHR_1_m;
u32 MPSC_CHR_2_m;
u32 MPSC_CHR_10_m;
u32 BRG_BCR_m;
struct mpsc_shared_regs *shared_regs;
};
/* Hooks to platform-specific code */
int mpsc_platform_register_driver(void);
void mpsc_platform_unregister_driver(void);
/* Hooks back in to mpsc common to be called by platform-specific code */
struct mpsc_port_info *mpsc_device_probe(int index);
struct mpsc_port_info *mpsc_device_remove(int index);
/*
*****************************************************************************
*
* Multi-Protocol Serial Controller Interface Registers
*
*****************************************************************************
*/
/* Main Configuratino Register Offsets */
#define MPSC_MMCRL 0x0000
#define MPSC_MMCRH 0x0004
#define MPSC_MPCR 0x0008
#define MPSC_CHR_1 0x000c
#define MPSC_CHR_2 0x0010
#define MPSC_CHR_3 0x0014
#define MPSC_CHR_4 0x0018
#define MPSC_CHR_5 0x001c
#define MPSC_CHR_6 0x0020
#define MPSC_CHR_7 0x0024
#define MPSC_CHR_8 0x0028
#define MPSC_CHR_9 0x002c
#define MPSC_CHR_10 0x0030
#define MPSC_CHR_11 0x0034
#define MPSC_MPCR_FRZ (1 << 9)
#define MPSC_MPCR_CL_5 0
#define MPSC_MPCR_CL_6 1
#define MPSC_MPCR_CL_7 2
#define MPSC_MPCR_CL_8 3
#define MPSC_MPCR_SBL_1 0
#define MPSC_MPCR_SBL_2 1
#define MPSC_CHR_2_TEV (1<<1)
#define MPSC_CHR_2_TA (1<<7)
#define MPSC_CHR_2_TTCS (1<<9)
#define MPSC_CHR_2_REV (1<<17)
#define MPSC_CHR_2_RA (1<<23)
#define MPSC_CHR_2_CRD (1<<25)
#define MPSC_CHR_2_EH (1<<31)
#define MPSC_CHR_2_PAR_ODD 0
#define MPSC_CHR_2_PAR_SPACE 1
#define MPSC_CHR_2_PAR_EVEN 2
#define MPSC_CHR_2_PAR_MARK 3
/* MPSC Signal Routing */
#define MPSC_MRR 0x0000
#define MPSC_RCRR 0x0004
#define MPSC_TCRR 0x0008
/*
*****************************************************************************
*
* Serial DMA Controller Interface Registers
*
*****************************************************************************
*/
#define SDMA_SDC 0x0000
#define SDMA_SDCM 0x0008
#define SDMA_RX_DESC 0x0800
#define SDMA_RX_BUF_PTR 0x0808
#define SDMA_SCRDP 0x0810
#define SDMA_TX_DESC 0x0c00
#define SDMA_SCTDP 0x0c10
#define SDMA_SFTDP 0x0c14
#define SDMA_DESC_CMDSTAT_PE (1<<0)
#define SDMA_DESC_CMDSTAT_CDL (1<<1)
#define SDMA_DESC_CMDSTAT_FR (1<<3)
#define SDMA_DESC_CMDSTAT_OR (1<<6)
#define SDMA_DESC_CMDSTAT_BR (1<<9)
#define SDMA_DESC_CMDSTAT_MI (1<<10)
#define SDMA_DESC_CMDSTAT_A (1<<11)
#define SDMA_DESC_CMDSTAT_AM (1<<12)
#define SDMA_DESC_CMDSTAT_CT (1<<13)
#define SDMA_DESC_CMDSTAT_C (1<<14)
#define SDMA_DESC_CMDSTAT_ES (1<<15)
#define SDMA_DESC_CMDSTAT_L (1<<16)
#define SDMA_DESC_CMDSTAT_F (1<<17)
#define SDMA_DESC_CMDSTAT_P (1<<18)
#define SDMA_DESC_CMDSTAT_EI (1<<23)
#define SDMA_DESC_CMDSTAT_O (1<<31)
#define SDMA_DESC_DFLT (SDMA_DESC_CMDSTAT_O | \
SDMA_DESC_CMDSTAT_EI)
#define SDMA_SDC_RFT (1<<0)
#define SDMA_SDC_SFM (1<<1)
#define SDMA_SDC_BLMR (1<<6)
#define SDMA_SDC_BLMT (1<<7)
#define SDMA_SDC_POVR (1<<8)
#define SDMA_SDC_RIFB (1<<9)
#define SDMA_SDCM_ERD (1<<7)
#define SDMA_SDCM_AR (1<<15)
#define SDMA_SDCM_STD (1<<16)
#define SDMA_SDCM_TXD (1<<23)
#define SDMA_SDCM_AT (1<<31)
#define SDMA_0_CAUSE_RXBUF (1<<0)
#define SDMA_0_CAUSE_RXERR (1<<1)
#define SDMA_0_CAUSE_TXBUF (1<<2)
#define SDMA_0_CAUSE_TXEND (1<<3)
#define SDMA_1_CAUSE_RXBUF (1<<8)
#define SDMA_1_CAUSE_RXERR (1<<9)
#define SDMA_1_CAUSE_TXBUF (1<<10)
#define SDMA_1_CAUSE_TXEND (1<<11)
#define SDMA_CAUSE_RX_MASK (SDMA_0_CAUSE_RXBUF | SDMA_0_CAUSE_RXERR | \
SDMA_1_CAUSE_RXBUF | SDMA_1_CAUSE_RXERR)
#define SDMA_CAUSE_TX_MASK (SDMA_0_CAUSE_TXBUF | SDMA_0_CAUSE_TXEND | \
SDMA_1_CAUSE_TXBUF | SDMA_1_CAUSE_TXEND)
/* SDMA Interrupt registers */
#define SDMA_INTR_CAUSE 0x0000
#define SDMA_INTR_MASK 0x0080
/*
*****************************************************************************
*
* Baud Rate Generator Interface Registers
*
*****************************************************************************
*/
#define BRG_BCR 0x0000
#define BRG_BTR 0x0004
#endif /* __MPSC_H__ */