pxa.h
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- /*
- * linux/drivers/pcmcia/pxa/pxa.h
- *
- * Author: George Davis
- * Created: Jan 10, 2002
- * Copyright: MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Originally based upon linux/drivers/pcmcia/sa1100_generic.h
- *
- */
- /*======================================================================
- Device driver for the PCMCIA control functionality of Intel
- PXA250/210 microprocessors.
- The contents of this file are subject to the Mozilla Public
- License Version 1.1 (the "License"); you may not use this file
- except in compliance with the License. You may obtain a copy of
- the License at http://www.mozilla.org/MPL/
- Software distributed under the License is distributed on an "AS
- IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- implied. See the License for the specific language governing
- rights and limitations under the License.
- The initial developer of the original code is John G. Dorsey
- <john+@cs.cmu.edu>. Portions created by John G. Dorsey are
- Copyright (C) 1999 John G. Dorsey. All Rights Reserved.
- Alternatively, the contents of this file may be used under the
- terms of the GNU Public License version 2 (the "GPL"), in which
- case the provisions of the GPL are applicable instead of the
- above. If you wish to allow the use of your version of this file
- only under the terms of the GPL and not to allow others to use
- your version of this file under the MPL, indicate your decision
- by deleting the provisions above and replace them with the notice
- and other provisions required by the GPL. If you do not delete
- the provisions above, a recipient may use your version of this
- file under either the MPL or the GPL.
-
- ======================================================================*/
- #if !defined(_PCMCIA_PXA_H)
- # define _PCMCIA_PXA_H
- #include <pcmcia/cs_types.h>
- #include <pcmcia/ss.h>
- #include <pcmcia/bulkmem.h>
- #include <pcmcia/cistpl.h>
- #include "../cs_internal.h"
- #include <asm/arch/pcmcia.h>
- /* MECR: Expansion Memory Configuration Register
- * (SA-1100 Developers Manual, p.10-13; SA-1110 Developers Manual, p.10-24)
- *
- * MECR layout is:
- *
- * FAST1 BSM1<4:0> BSA1<4:0> BSIO1<4:0> FAST0 BSM0<4:0> BSA0<4:0> BSIO0<4:0>
- *
- * (This layout is actually true only for the SA-1110; the FASTn bits are
- * reserved on the SA-1100.)
- */
- #define MCXX_SETUP_MASK (0x7f)
- #define MCXX_ASST_MASK (0x1f)
- #define MCXX_HOLD_MASK (0x3f)
- #define MCXX_SETUP_SHIFT (0)
- #define MCXX_ASST_SHIFT (7)
- #define MCXX_HOLD_SHIFT (14)
- #define MECR_SET(mecr, sock, shift, mask, bs)
- ((mecr)=((mecr)&~(((mask)<<(shift))<<
- ((sock)==0?MECR_SOCKET_0_SHIFT:MECR_SOCKET_1_SHIFT)))|
- (((bs)<<(shift))<<((sock)==0?MECR_SOCKET_0_SHIFT:MECR_SOCKET_1_SHIFT)))
- #define MECR_GET(mecr, sock, shift, mask)
- ((((mecr)>>(((sock)==0)?MECR_SOCKET_0_SHIFT:MECR_SOCKET_1_SHIFT))>>
- (shift))&(mask))
- #define MECR_BSIO_SET(mecr, sock, bs)
- MECR_SET((mecr), (sock), MECR_BSIO_SHIFT, MECR_BS_MASK, (bs))
- #define MECR_BSIO_GET(mecr, sock)
- MECR_GET((mecr), (sock), MECR_BSIO_SHIFT, MECR_BS_MASK)
- #define MECR_BSA_SET(mecr, sock, bs)
- MECR_SET((mecr), (sock), MECR_BSA_SHIFT, MECR_BS_MASK, (bs))
- #define MECR_BSA_GET(mecr, sock)
- MECR_GET((mecr), (sock), MECR_BSA_SHIFT, MECR_BS_MASK)
- #define MECR_BSM_SET(mecr, sock, bs)
- MECR_SET((mecr), (sock), MECR_BSM_SHIFT, MECR_BS_MASK, (bs))
- #define MECR_BSM_GET(mecr, sock)
- MECR_GET((mecr), (sock), MECR_BSM_SHIFT, MECR_BS_MASK)
- #define MECR_FAST_SET(mecr, sock, fast)
- MECR_SET((mecr), (sock), MECR_FAST_SHIFT, MECR_FAST_MODE_MASK, (fast))
- #define MECR_FAST_GET(mecr, sock)
- MECR_GET((mecr), (sock), MECR_FAST_SHIFT, MECR_FAST_MODE_MASK)
- /* This function implements the BS value calculation for setting the MECR
- * using integer arithmetic:
- */
- static inline unsigned int pxa_pcmcia_mecr_bs(unsigned int pcmcia_cycle_ns,
- unsigned int cpu_clock_khz){
- unsigned int t = ((pcmcia_cycle_ns * cpu_clock_khz) / 6) - 1000000;
- return (t / 1000000) + (((t % 1000000) == 0) ? 0 : 1);
- }
- static inline u_int pxa_mcxx_hold(u_int pcmcia_cycle_ns,
- u_int mem_clk_10khz){
- u_int code = pcmcia_cycle_ns * mem_clk_10khz;
- return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
- }
- static inline u_int pxa_mcxx_asst(u_int pcmcia_cycle_ns,
- u_int mem_clk_10khz){
- u_int code = pcmcia_cycle_ns * mem_clk_10khz;
- return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
- }
- static inline u_int pxa_mcxx_setup(u_int pcmcia_cycle_ns,
- u_int mem_clk_10khz){
- u_int code = pcmcia_cycle_ns * mem_clk_10khz;
- return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
- }
- /* This function returns the (approxmiate) command assertion period, in
- * nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
- */
- static inline u_int pxa_pcmcia_cmd_time(u_int mem_clk_10khz,
- u_int pcmcia_mcxx_asst){
- return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
- }
- /* SA-1100 PCMCIA Memory and I/O timing
- * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- * The SA-1110 Developer's Manual, section 10.2.5, says the following:
- *
- * "To calculate the recommended BS_xx value for each address space:
- * divide the command width time (the greater of twIOWR and twIORD,
- * or the greater of twWE and twOE) by processor cycle time; divide
- * by 2; divide again by 3 (number of BCLK's per command assertion);
- * round up to the next whole number; and subtract 1."
- *
- * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
- * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
- * a minimum value of 165ns, as well. Section 4.7.2 (describing
- * common and attribute memory write timing) says that twWE has a
- * minimum value of 150ns for a 250ns cycle time (for 5V operation;
- * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
- * operation, also section 4.7.4). Section 4.7.3 says that taOE
- * has a maximum value of 150ns for a 300ns cycle time (for 5V
- * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
- *
- * When configuring memory maps, Card Services appears to adopt the policy
- * that a memory access time of "0" means "use the default." The default
- * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
- * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
- * memory command width time is 300ns.
- */
- #define PXA_PCMCIA_IO_ACCESS (165)
- #define PXA_PCMCIA_5V_MEM_ACCESS (150)
- #define PXA_PCMCIA_3V_MEM_ACCESS (300)
- /* The socket driver actually works nicely in interrupt-driven form,
- * so the (relatively infrequent) polling is "just to be sure."
- */
- #define PXA_PCMCIA_POLL_PERIOD (2*HZ)
- /* This structure encapsulates per-socket state which we might need to
- * use when responding to a Card Services query of some kind.
- */
- struct pxa_pcmcia_socket {
- socket_state_t cs_state;
- struct pcmcia_state k_state;
- unsigned int irq;
- void (*handler)(void *, unsigned int);
- void *handler_info;
- pccard_io_map io_map[MAX_IO_WIN];
- pccard_mem_map mem_map[MAX_WIN];
- ioaddr_t virt_io, phys_attr, phys_mem;
- unsigned short speed_io, speed_attr, speed_mem;
- };
- /* I/O pins replacing memory pins
- * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
- *
- * These signals change meaning when going from memory-only to
- * memory-or-I/O interface:
- */
- #define iostschg bvd1
- #define iospkr bvd2
- /*
- * Declaration for all implementation specific low_level operations.
- */
- extern struct pcmcia_low_level lubbock_pcmcia_ops;
- extern struct pcmcia_low_level pxa_idp_pcmcia_ops;
- extern struct pcmcia_low_level cerf_pcmcia_ops;
- #endif /* !defined(_PCMCIA_PXA_H) */