cpm2.h

linux 内核源代码

/*
 * Communication Processor Module v2.
 *
 * This file contains structures and information for the communication
 * processor channels found in the dual port RAM or parameter RAM.
 * All CPM control and status is available through the CPM2 internal
 * memory map.  See immap_cpm2.h for details.
 */
#ifdef __KERNEL__
#ifndef __CPM2__
#define __CPM2__

#include <asm/immap_cpm2.h>
#include <asm/cpm.h>

#ifdef CONFIG_PPC_85xx
#define CPM_MAP_ADDR (get_immrbase() + 0x80000)
#endif

/* CPM Command register.
*/
#define CPM_CR_RST	((uint)0x80000000)
#define CPM_CR_PAGE	((uint)0x7c000000)
#define CPM_CR_SBLOCK	((uint)0x03e00000)
#define CPM_CR_FLG	((uint)0x00010000)
#define CPM_CR_MCN	((uint)0x00003fc0)
#define CPM_CR_OPCODE	((uint)0x0000000f)

/* Device sub-block and page codes.
*/
#define CPM_CR_SCC1_SBLOCK	(0x04)
#define CPM_CR_SCC2_SBLOCK	(0x05)
#define CPM_CR_SCC3_SBLOCK	(0x06)
#define CPM_CR_SCC4_SBLOCK	(0x07)
#define CPM_CR_SMC1_SBLOCK	(0x08)
#define CPM_CR_SMC2_SBLOCK	(0x09)
#define CPM_CR_SPI_SBLOCK	(0x0a)
#define CPM_CR_I2C_SBLOCK	(0x0b)
#define CPM_CR_TIMER_SBLOCK	(0x0f)
#define CPM_CR_RAND_SBLOCK	(0x0e)
#define CPM_CR_FCC1_SBLOCK	(0x10)
#define CPM_CR_FCC2_SBLOCK	(0x11)
#define CPM_CR_FCC3_SBLOCK	(0x12)
#define CPM_CR_IDMA1_SBLOCK	(0x14)
#define CPM_CR_IDMA2_SBLOCK	(0x15)
#define CPM_CR_IDMA3_SBLOCK	(0x16)
#define CPM_CR_IDMA4_SBLOCK	(0x17)
#define CPM_CR_MCC1_SBLOCK	(0x1c)

#define CPM_CR_FCC_SBLOCK(x)	(x + 0x10)

#define CPM_CR_SCC1_PAGE	(0x00)
#define CPM_CR_SCC2_PAGE	(0x01)
#define CPM_CR_SCC3_PAGE	(0x02)
#define CPM_CR_SCC4_PAGE	(0x03)
#define CPM_CR_SMC1_PAGE	(0x07)
#define CPM_CR_SMC2_PAGE	(0x08)
#define CPM_CR_SPI_PAGE		(0x09)
#define CPM_CR_I2C_PAGE		(0x0a)
#define CPM_CR_TIMER_PAGE	(0x0a)
#define CPM_CR_RAND_PAGE	(0x0a)
#define CPM_CR_FCC1_PAGE	(0x04)
#define CPM_CR_FCC2_PAGE	(0x05)
#define CPM_CR_FCC3_PAGE	(0x06)
#define CPM_CR_IDMA1_PAGE	(0x07)
#define CPM_CR_IDMA2_PAGE	(0x08)
#define CPM_CR_IDMA3_PAGE	(0x09)
#define CPM_CR_IDMA4_PAGE	(0x0a)
#define CPM_CR_MCC1_PAGE	(0x07)
#define CPM_CR_MCC2_PAGE	(0x08)

#define CPM_CR_FCC_PAGE(x)	(x + 0x04)

/* Some opcodes (there are more...later)
*/
#define CPM_CR_INIT_TRX		((ushort)0x0000)
#define CPM_CR_INIT_RX		((ushort)0x0001)
#define CPM_CR_INIT_TX		((ushort)0x0002)
#define CPM_CR_HUNT_MODE	((ushort)0x0003)
#define CPM_CR_STOP_TX		((ushort)0x0004)
#define CPM_CR_GRA_STOP_TX	((ushort)0x0005)
#define CPM_CR_RESTART_TX	((ushort)0x0006)
#define CPM_CR_SET_GADDR	((ushort)0x0008)
#define CPM_CR_START_IDMA	((ushort)0x0009)
#define CPM_CR_STOP_IDMA	((ushort)0x000b)

#define mk_cr_cmd(PG, SBC, MCN, OP) \
	((PG << 26) | (SBC << 21) | (MCN << 6) | OP)

#ifndef CONFIG_PPC_CPM_NEW_BINDING
/* Dual Port RAM addresses.  The first 16K is available for almost
 * any CPM use, so we put the BDs there.  The first 128 bytes are
 * used for SMC1 and SMC2 parameter RAM, so we start allocating
 * BDs above that.  All of this must change when we start
 * downloading RAM microcode.
 */
#define CPM_DATAONLY_BASE	((uint)128)
#define CPM_DP_NOSPACE		((uint)0x7fffffff)
#if defined(CONFIG_8272) || defined(CONFIG_MPC8555)
#define CPM_DATAONLY_SIZE	((uint)(8 * 1024) - CPM_DATAONLY_BASE)
#define CPM_FCC_SPECIAL_BASE	((uint)0x00009000)
#else
#define CPM_DATAONLY_SIZE	((uint)(16 * 1024) - CPM_DATAONLY_BASE)
#define CPM_FCC_SPECIAL_BASE	((uint)0x0000b000)
#endif
#endif

/* The number of pages of host memory we allocate for CPM.  This is
 * done early in kernel initialization to get physically contiguous
 * pages.
 */
#define NUM_CPM_HOST_PAGES	2

/* Export the base address of the communication processor registers
 * and dual port ram.
 */
extern cpm_cpm2_t __iomem *cpmp; /* Pointer to comm processor */

#ifdef CONFIG_PPC_CPM_NEW_BINDING
#define cpm_dpalloc cpm_muram_alloc
#define cpm_dpfree cpm_muram_free
#define cpm_dpram_addr cpm_muram_addr
#else
extern unsigned long cpm_dpalloc(uint size, uint align);
extern int cpm_dpfree(unsigned long offset);
extern unsigned long cpm_dpalloc_fixed(unsigned long offset, uint size, uint align);
extern void cpm_dpdump(void);
extern void *cpm_dpram_addr(unsigned long offset);
#endif

extern void cpm_setbrg(uint brg, uint rate);
extern void cpm2_fastbrg(uint brg, uint rate, int div16);
extern void cpm2_reset(void);


/* Buffer descriptors used by many of the CPM protocols.
*/
typedef struct cpm_buf_desc {
	ushort	cbd_sc;		/* Status and Control */
	ushort	cbd_datlen;	/* Data length in buffer */
	uint	cbd_bufaddr;	/* Buffer address in host memory */
} cbd_t;

#define BD_SC_EMPTY	((ushort)0x8000)	/* Receive is empty */
#define BD_SC_READY	((ushort)0x8000)	/* Transmit is ready */
#define BD_SC_WRAP	((ushort)0x2000)	/* Last buffer descriptor */
#define BD_SC_INTRPT	((ushort)0x1000)	/* Interrupt on change */
#define BD_SC_LAST	((ushort)0x0800)	/* Last buffer in frame */
#define BD_SC_CM	((ushort)0x0200)	/* Continous mode */
#define BD_SC_ID	((ushort)0x0100)	/* Rec'd too many idles */
#define BD_SC_P		((ushort)0x0100)	/* xmt preamble */
#define BD_SC_BR	((ushort)0x0020)	/* Break received */
#define BD_SC_FR	((ushort)0x0010)	/* Framing error */
#define BD_SC_PR	((ushort)0x0008)	/* Parity error */
#define BD_SC_OV	((ushort)0x0002)	/* Overrun */
#define BD_SC_CD	((ushort)0x0001)	/* ?? */

/* Function code bits, usually generic to devices.
*/
#define CPMFCR_GBL	((u_char)0x20)	/* Set memory snooping */
#define CPMFCR_EB	((u_char)0x10)	/* Set big endian byte order */
#define CPMFCR_TC2	((u_char)0x04)	/* Transfer code 2 value */
#define CPMFCR_DTB	((u_char)0x02)	/* Use local bus for data when set */
#define CPMFCR_BDB	((u_char)0x01)	/* Use local bus for BD when set */

/* Parameter RAM offsets from the base.
*/
#define PROFF_SCC1		((uint)0x8000)
#define PROFF_SCC2		((uint)0x8100)
#define PROFF_SCC3		((uint)0x8200)
#define PROFF_SCC4		((uint)0x8300)
#define PROFF_FCC1		((uint)0x8400)
#define PROFF_FCC2		((uint)0x8500)
#define PROFF_FCC3		((uint)0x8600)
#define PROFF_MCC1		((uint)0x8700)
#define PROFF_SMC1_BASE		((uint)0x87fc)
#define PROFF_IDMA1_BASE	((uint)0x87fe)
#define PROFF_MCC2		((uint)0x8800)
#define PROFF_SMC2_BASE		((uint)0x88fc)
#define PROFF_IDMA2_BASE	((uint)0x88fe)
#define PROFF_SPI_BASE		((uint)0x89fc)
#define PROFF_IDMA3_BASE	((uint)0x89fe)
#define PROFF_TIMERS		((uint)0x8ae0)
#define PROFF_REVNUM		((uint)0x8af0)
#define PROFF_RAND		((uint)0x8af8)
#define PROFF_I2C_BASE		((uint)0x8afc)
#define PROFF_IDMA4_BASE	((uint)0x8afe)

#define PROFF_SCC_SIZE		((uint)0x100)
#define PROFF_FCC_SIZE		((uint)0x100)
#define PROFF_SMC_SIZE		((uint)64)

/* The SMCs are relocated to any of the first eight DPRAM pages.
 * We will fix these at the first locations of DPRAM, until we
 * get some microcode patches :-).
 * The parameter ram space for the SMCs is fifty-some bytes, and
 * they are required to start on a 64 byte boundary.
 */
#define PROFF_SMC1	(0)
#define PROFF_SMC2	(64)


/* Define enough so I can at least use the serial port as a UART.
 */
typedef struct smc_uart {
	ushort	smc_rbase;	/* Rx Buffer descriptor base address */
	ushort	smc_tbase;	/* Tx Buffer descriptor base address */
	u_char	smc_rfcr;	/* Rx function code */
	u_char	smc_tfcr;	/* Tx function code */
	ushort	smc_mrblr;	/* Max receive buffer length */
	uint	smc_rstate;	/* Internal */
	uint	smc_idp;	/* Internal */
	ushort	smc_rbptr;	/* Internal */
	ushort	smc_ibc;	/* Internal */
	uint	smc_rxtmp;	/* Internal */
	uint	smc_tstate;	/* Internal */
	uint	smc_tdp;	/* Internal */
	ushort	smc_tbptr;	/* Internal */
	ushort	smc_tbc;	/* Internal */
	uint	smc_txtmp;	/* Internal */
	ushort	smc_maxidl;	/* Maximum idle characters */
	ushort	smc_tmpidl;	/* Temporary idle counter */
	ushort	smc_brklen;	/* Last received break length */
	ushort	smc_brkec;	/* rcv'd break condition counter */
	ushort	smc_brkcr;	/* xmt break count register */
	ushort	smc_rmask;	/* Temporary bit mask */
	uint	smc_stmp;	/* SDMA Temp */
} smc_uart_t;

/* SMC uart mode register (Internal memory map).
*/
#define SMCMR_REN	((ushort)0x0001)
#define SMCMR_TEN	((ushort)0x0002)
#define SMCMR_DM	((ushort)0x000c)
#define SMCMR_SM_GCI	((ushort)0x0000)
#define SMCMR_SM_UART	((ushort)0x0020)
#define SMCMR_SM_TRANS	((ushort)0x0030)
#define SMCMR_SM_MASK	((ushort)0x0030)
#define SMCMR_PM_EVEN	((ushort)0x0100)	/* Even parity, else odd */
#define SMCMR_REVD	SMCMR_PM_EVEN
#define SMCMR_PEN	((ushort)0x0200)	/* Parity enable */
#define SMCMR_BS	SMCMR_PEN
#define SMCMR_SL	((ushort)0x0400)	/* Two stops, else one */
#define SMCR_CLEN_MASK	((ushort)0x7800)	/* Character length */
#define smcr_mk_clen(C)	(((C) << 11) & SMCR_CLEN_MASK)

/* SMC Event and Mask register.
*/
#define SMCM_BRKE       ((unsigned char)0x40)   /* When in UART Mode */
#define SMCM_BRK        ((unsigned char)0x10)   /* When in UART Mode */
#define SMCM_TXE	((unsigned char)0x10)
#define SMCM_BSY	((unsigned char)0x04)
#define SMCM_TX		((unsigned char)0x02)
#define SMCM_RX		((unsigned char)0x01)

/* Baud rate generators.
*/
#define CPM_BRG_RST		((uint)0x00020000)
#define CPM_BRG_EN		((uint)0x00010000)
#define CPM_BRG_EXTC_INT	((uint)0x00000000)
#define CPM_BRG_EXTC_CLK3_9	((uint)0x00004000)
#define CPM_BRG_EXTC_CLK5_15	((uint)0x00008000)
#define CPM_BRG_ATB		((uint)0x00002000)
#define CPM_BRG_CD_MASK		((uint)0x00001ffe)
#define CPM_BRG_DIV16		((uint)0x00000001)

/* SCCs.
*/
#define SCC_GSMRH_IRP		((uint)0x00040000)
#define SCC_GSMRH_GDE		((uint)0x00010000)
#define SCC_GSMRH_TCRC_CCITT	((uint)0x00008000)
#define SCC_GSMRH_TCRC_BISYNC	((uint)0x00004000)
#define SCC_GSMRH_TCRC_HDLC	((uint)0x00000000)
#define SCC_GSMRH_REVD		((uint)0x00002000)
#define SCC_GSMRH_TRX		((uint)0x00001000)
#define SCC_GSMRH_TTX		((uint)0x00000800)
#define SCC_GSMRH_CDP		((uint)0x00000400)
#define SCC_GSMRH_CTSP		((uint)0x00000200)
#define SCC_GSMRH_CDS		((uint)0x00000100)
#define SCC_GSMRH_CTSS		((uint)0x00000080)
#define SCC_GSMRH_TFL		((uint)0x00000040)
#define SCC_GSMRH_RFW		((uint)0x00000020)
#define SCC_GSMRH_TXSY		((uint)0x00000010)
#define SCC_GSMRH_SYNL16	((uint)0x0000000c)
#define SCC_GSMRH_SYNL8		((uint)0x00000008)
#define SCC_GSMRH_SYNL4		((uint)0x00000004)
#define SCC_GSMRH_RTSM		((uint)0x00000002)
#define SCC_GSMRH_RSYN		((uint)0x00000001)

#define SCC_GSMRL_SIR		((uint)0x80000000)	/* SCC2 only */
#define SCC_GSMRL_EDGE_NONE	((uint)0x60000000)
#define SCC_GSMRL_EDGE_NEG	((uint)0x40000000)
#define SCC_GSMRL_EDGE_POS	((uint)0x20000000)
#define SCC_GSMRL_EDGE_BOTH	((uint)0x00000000)
#define SCC_GSMRL_TCI		((uint)0x10000000)
#define SCC_GSMRL_TSNC_3	((uint)0x0c000000)
#define SCC_GSMRL_TSNC_4	((uint)0x08000000)
#define SCC_GSMRL_TSNC_14	((uint)0x04000000)
#define SCC_GSMRL_TSNC_INF	((uint)0x00000000)
#define SCC_GSMRL_RINV		((uint)0x02000000)
#define SCC_GSMRL_TINV		((uint)0x01000000)
#define SCC_GSMRL_TPL_128	((uint)0x00c00000)
#define SCC_GSMRL_TPL_64	((uint)0x00a00000)
#define SCC_GSMRL_TPL_48	((uint)0x00800000)
#define SCC_GSMRL_TPL_32	((uint)0x00600000)
#define SCC_GSMRL_TPL_16	((uint)0x00400000)
#define SCC_GSMRL_TPL_8		((uint)0x00200000)
#define SCC_GSMRL_TPL_NONE	((uint)0x00000000)
#define SCC_GSMRL_TPP_ALL1	((uint)0x00180000)
#define SCC_GSMRL_TPP_01	((uint)0x00100000)
#define SCC_GSMRL_TPP_10	((uint)0x00080000)
#define SCC_GSMRL_TPP_ZEROS	((uint)0x00000000)
#define SCC_GSMRL_TEND		((uint)0x00040000)
#define SCC_GSMRL_TDCR_32	((uint)0x00030000)
#define SCC_GSMRL_TDCR_16	((uint)0x00020000)
#define SCC_GSMRL_TDCR_8	((uint)0x00010000)
#define SCC_GSMRL_TDCR_1	((uint)0x00000000)
#define SCC_GSMRL_RDCR_32	((uint)0x0000c000)
#define SCC_GSMRL_RDCR_16	((uint)0x00008000)