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-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIVAwUAT3NKzROxKuMESys7AQKElw/+JyDxJSlj+g+nymkx8IVVuU8CsEwNLgRk 8KEnRfLhGtkXFLSJYWO6jzGo16F8Uqli1PdMFte/wagSv0285/HZaKlkkBVHdJ/m u40oSjgT013bBh6MQ0Oaf8pFezFUiQB5zPOA9QGaLVGDLXCmgqUgd7exaD5wRIwB ZmyItjZeAVnDfk1R+ZiNYytHAi8A5wSB+eFDCIQYgyulA1Igd1UnRtx+dRKbvc/m rWQ6KWbZHIdvP1ksd8wHHkrlUD2pEeJ8glJLsZUhMm/5oMf/8RmOCvmo8rvE/qwl eDQ1h4cGYlfjobxXZMHqAN9m7Jg2bI946HZjdb7/7oCeO6VW3FwPZ/Ic75p+wp45 HXJTItufERYk6QxShiOKvA+QexnYwY0IT5oRP4DrhdVB/X9cl2MoaZHC+RbYLQy+ /5VNZKi38iK4F9AbFamS7kd0i5QszA/ZzEzKZ6VMuOp3W/fagpn4ZJT1LIA3m4A9 Q0cj24mqeyCfjysu0TMbPtaN+Yjeu1o1OFRvM8XffbZsp5bNzuTDEvviJ2NXw4vK 4qUHulhYSEWcu9YgAZXvEWDEM78FXCkg2v/CrZXH5tyc95kUkMPcgG+QZBB5wElR FaOKpiC/BuNIGEf02IZQ4nfDxE90QwnDeoYeV+FvNj9UEOopJ5z5bMPoTHxm4cCD NypQthI85pc= =G9mT -----END PGP SIGNATURE----- Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system Pull "Disintegrate and delete asm/system.h" from David Howells: "Here are a bunch of patches to disintegrate asm/system.h into a set of separate bits to relieve the problem of circular inclusion dependencies. I've built all the working defconfigs from all the arches that I can and made sure that they don't break. The reason for these patches is that I recently encountered a circular dependency problem that came about when I produced some patches to optimise get_order() by rewriting it to use ilog2(). This uses bitops - and on the SH arch asm/bitops.h drags in asm-generic/get_order.h by a circuituous route involving asm/system.h. The main difficulty seems to be asm/system.h. It holds a number of low level bits with no/few dependencies that are commonly used (eg. memory barriers) and a number of bits with more dependencies that aren't used in many places (eg. switch_to()). These patches break asm/system.h up into the following core pieces: (1) asm/barrier.h Move memory barriers here. This already done for MIPS and Alpha. (2) asm/switch_to.h Move switch_to() and related stuff here. (3) asm/exec.h Move arch_align_stack() here. Other process execution related bits could perhaps go here from asm/processor.h. (4) asm/cmpxchg.h Move xchg() and cmpxchg() here as they're full word atomic ops and frequently used by atomic_xchg() and atomic_cmpxchg(). (5) asm/bug.h Move die() and related bits. (6) asm/auxvec.h Move AT_VECTOR_SIZE_ARCH here. Other arch headers are created as needed on a per-arch basis." Fixed up some conflicts from other header file cleanups and moving code around that has happened in the meantime, so David's testing is somewhat weakened by that. We'll find out anything that got broken and fix it.. * tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits) Delete all instances of asm/system.h Remove all #inclusions of asm/system.h Add #includes needed to permit the removal of asm/system.h Move all declarations of free_initmem() to linux/mm.h Disintegrate asm/system.h for OpenRISC Split arch_align_stack() out from asm-generic/system.h Split the switch_to() wrapper out of asm-generic/system.h Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h Create asm-generic/barrier.h Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h Disintegrate asm/system.h for Xtensa Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt] Disintegrate asm/system.h for Tile Disintegrate asm/system.h for Sparc Disintegrate asm/system.h for SH Disintegrate asm/system.h for Score Disintegrate asm/system.h for S390 Disintegrate asm/system.h for PowerPC Disintegrate asm/system.h for PA-RISC Disintegrate asm/system.h for MN10300 ...
392 lines
10 KiB
C
392 lines
10 KiB
C
/*======================================================================
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Device driver for the PCMCIA control functionality of PXA2xx
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microprocessors.
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The contents of this file may be used under the
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terms of the GNU Public License version 2 (the "GPL")
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(c) Ian Molton (spyro@f2s.com) 2003
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(c) Stefan Eletzhofer (stefan.eletzhofer@inquant.de) 2003,4
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derived from sa11xx_base.c
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Portions created by John G. Dorsey are
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Copyright (C) 1999 John G. Dorsey.
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======================================================================*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/cpufreq.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/platform_device.h>
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#include <mach/hardware.h>
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#include <mach/smemc.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <mach/pxa2xx-regs.h>
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#include <asm/mach-types.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/cistpl.h>
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#include "soc_common.h"
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#include "pxa2xx_base.h"
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/*
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* Personal Computer Memory Card International Association (PCMCIA) sockets
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*/
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#define PCMCIAPrtSp 0x04000000 /* PCMCIA Partition Space [byte] */
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#define PCMCIASp (4*PCMCIAPrtSp) /* PCMCIA Space [byte] */
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#define PCMCIAIOSp PCMCIAPrtSp /* PCMCIA I/O Space [byte] */
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#define PCMCIAAttrSp PCMCIAPrtSp /* PCMCIA Attribute Space [byte] */
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#define PCMCIAMemSp PCMCIAPrtSp /* PCMCIA Memory Space [byte] */
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#define PCMCIA0Sp PCMCIASp /* PCMCIA 0 Space [byte] */
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#define PCMCIA0IOSp PCMCIAIOSp /* PCMCIA 0 I/O Space [byte] */
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#define PCMCIA0AttrSp PCMCIAAttrSp /* PCMCIA 0 Attribute Space [byte] */
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#define PCMCIA0MemSp PCMCIAMemSp /* PCMCIA 0 Memory Space [byte] */
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#define PCMCIA1Sp PCMCIASp /* PCMCIA 1 Space [byte] */
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#define PCMCIA1IOSp PCMCIAIOSp /* PCMCIA 1 I/O Space [byte] */
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#define PCMCIA1AttrSp PCMCIAAttrSp /* PCMCIA 1 Attribute Space [byte] */
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#define PCMCIA1MemSp PCMCIAMemSp /* PCMCIA 1 Memory Space [byte] */
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#define _PCMCIA(Nb) /* PCMCIA [0..1] */ \
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(0x20000000 + (Nb) * PCMCIASp)
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#define _PCMCIAIO(Nb) _PCMCIA(Nb) /* PCMCIA I/O [0..1] */
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#define _PCMCIAAttr(Nb) /* PCMCIA Attribute [0..1] */ \
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(_PCMCIA(Nb) + 2 * PCMCIAPrtSp)
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#define _PCMCIAMem(Nb) /* PCMCIA Memory [0..1] */ \
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(_PCMCIA(Nb) + 3 * PCMCIAPrtSp)
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#define _PCMCIA0 _PCMCIA(0) /* PCMCIA 0 */
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#define _PCMCIA0IO _PCMCIAIO(0) /* PCMCIA 0 I/O */
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#define _PCMCIA0Attr _PCMCIAAttr(0) /* PCMCIA 0 Attribute */
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#define _PCMCIA0Mem _PCMCIAMem(0) /* PCMCIA 0 Memory */
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#define _PCMCIA1 _PCMCIA(1) /* PCMCIA 1 */
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#define _PCMCIA1IO _PCMCIAIO(1) /* PCMCIA 1 I/O */
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#define _PCMCIA1Attr _PCMCIAAttr(1) /* PCMCIA 1 Attribute */
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#define _PCMCIA1Mem _PCMCIAMem(1) /* PCMCIA 1 Memory */
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#define MCXX_SETUP_MASK (0x7f)
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#define MCXX_ASST_MASK (0x1f)
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#define MCXX_HOLD_MASK (0x3f)
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#define MCXX_SETUP_SHIFT (0)
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#define MCXX_ASST_SHIFT (7)
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#define MCXX_HOLD_SHIFT (14)
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static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns,
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u_int mem_clk_10khz)
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{
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u_int code = pcmcia_cycle_ns * mem_clk_10khz;
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return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
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}
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static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns,
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u_int mem_clk_10khz)
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{
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u_int code = pcmcia_cycle_ns * mem_clk_10khz;
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return (code / 300000) + ((code % 300000) ? 1 : 0) + 1;
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}
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static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns,
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u_int mem_clk_10khz)
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{
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u_int code = pcmcia_cycle_ns * mem_clk_10khz;
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return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
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}
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/* This function returns the (approximate) command assertion period, in
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* nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
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*/
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static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
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u_int pcmcia_mcxx_asst)
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{
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return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
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}
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static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock )
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{
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uint32_t val;
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val = ((pxa2xx_mcxx_setup(speed, clock)
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& MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
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| ((pxa2xx_mcxx_asst(speed, clock)
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& MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
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| ((pxa2xx_mcxx_hold(speed, clock)
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& MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
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__raw_writel(val, MCMEM(sock));
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return 0;
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}
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static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
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{
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uint32_t val;
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val = ((pxa2xx_mcxx_setup(speed, clock)
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& MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
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| ((pxa2xx_mcxx_asst(speed, clock)
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& MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
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| ((pxa2xx_mcxx_hold(speed, clock)
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& MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
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__raw_writel(val, MCIO(sock));
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return 0;
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}
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static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
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{
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uint32_t val;
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val = ((pxa2xx_mcxx_setup(speed, clock)
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& MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
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| ((pxa2xx_mcxx_asst(speed, clock)
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& MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
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| ((pxa2xx_mcxx_hold(speed, clock)
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& MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
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__raw_writel(val, MCATT(sock));
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return 0;
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}
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static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int clk)
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{
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struct soc_pcmcia_timing timing;
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int sock = skt->nr;
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soc_common_pcmcia_get_timing(skt, &timing);
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pxa2xx_pcmcia_set_mcmem(sock, timing.mem, clk);
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pxa2xx_pcmcia_set_mcatt(sock, timing.attr, clk);
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pxa2xx_pcmcia_set_mcio(sock, timing.io, clk);
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return 0;
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}
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static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
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{
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unsigned long clk = clk_get_rate(skt->clk);
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return pxa2xx_pcmcia_set_mcxx(skt, clk / 10000);
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}
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#ifdef CONFIG_CPU_FREQ
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static int
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pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
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unsigned long val,
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struct cpufreq_freqs *freqs)
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{
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switch (val) {
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case CPUFREQ_PRECHANGE:
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if (freqs->new > freqs->old) {
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debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
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"pre-updating\n",
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freqs->new / 1000, (freqs->new / 100) % 10,
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freqs->old / 1000, (freqs->old / 100) % 10);
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pxa2xx_pcmcia_set_timing(skt);
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}
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break;
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case CPUFREQ_POSTCHANGE:
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if (freqs->new < freqs->old) {
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debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
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"post-updating\n",
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freqs->new / 1000, (freqs->new / 100) % 10,
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freqs->old / 1000, (freqs->old / 100) % 10);
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pxa2xx_pcmcia_set_timing(skt);
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}
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break;
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}
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return 0;
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}
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#endif
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void pxa2xx_configure_sockets(struct device *dev)
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{
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struct pcmcia_low_level *ops = dev->platform_data;
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/*
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* We have at least one socket, so set MECR:CIT
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* (Card Is There)
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*/
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uint32_t mecr = MECR_CIT;
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/* Set MECR:NOS (Number Of Sockets) */
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if ((ops->first + ops->nr) > 1 ||
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machine_is_viper() || machine_is_arcom_zeus())
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mecr |= MECR_NOS;
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__raw_writel(mecr, MECR);
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}
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EXPORT_SYMBOL(pxa2xx_configure_sockets);
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static const char *skt_names[] = {
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"PCMCIA socket 0",
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"PCMCIA socket 1",
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};
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#define SKT_DEV_INFO_SIZE(n) \
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(sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))
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int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
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{
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skt->res_skt.start = _PCMCIA(skt->nr);
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skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
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skt->res_skt.name = skt_names[skt->nr];
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skt->res_skt.flags = IORESOURCE_MEM;
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skt->res_io.start = _PCMCIAIO(skt->nr);
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skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
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skt->res_io.name = "io";
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skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
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skt->res_mem.start = _PCMCIAMem(skt->nr);
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skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
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skt->res_mem.name = "memory";
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skt->res_mem.flags = IORESOURCE_MEM;
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skt->res_attr.start = _PCMCIAAttr(skt->nr);
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skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
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skt->res_attr.name = "attribute";
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skt->res_attr.flags = IORESOURCE_MEM;
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return soc_pcmcia_add_one(skt);
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}
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EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one);
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void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops)
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{
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/* Provide our PXA2xx specific timing routines. */
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ops->set_timing = pxa2xx_pcmcia_set_timing;
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#ifdef CONFIG_CPU_FREQ
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ops->frequency_change = pxa2xx_pcmcia_frequency_change;
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#endif
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}
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EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops);
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static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
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{
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int i, ret = 0;
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struct pcmcia_low_level *ops;
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struct skt_dev_info *sinfo;
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struct soc_pcmcia_socket *skt;
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struct clk *clk;
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ops = (struct pcmcia_low_level *)dev->dev.platform_data;
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if (!ops) {
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ret = -ENODEV;
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goto err0;
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}
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if (cpu_is_pxa320() && ops->nr > 1) {
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dev_err(&dev->dev, "pxa320 supports only one pcmcia slot");
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ret = -EINVAL;
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goto err0;
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}
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clk = clk_get(&dev->dev, NULL);
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if (!clk)
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return -ENODEV;
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pxa2xx_drv_pcmcia_ops(ops);
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sinfo = kzalloc(SKT_DEV_INFO_SIZE(ops->nr), GFP_KERNEL);
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if (!sinfo) {
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clk_put(clk);
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return -ENOMEM;
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}
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sinfo->nskt = ops->nr;
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sinfo->clk = clk;
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/* Initialize processor specific parameters */
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for (i = 0; i < ops->nr; i++) {
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skt = &sinfo->skt[i];
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skt->nr = ops->first + i;
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skt->clk = clk;
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soc_pcmcia_init_one(skt, ops, &dev->dev);
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ret = pxa2xx_drv_pcmcia_add_one(skt);
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if (ret)
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goto err1;
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}
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pxa2xx_configure_sockets(&dev->dev);
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dev_set_drvdata(&dev->dev, sinfo);
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return 0;
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err1:
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while (--i >= 0)
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soc_pcmcia_remove_one(&sinfo->skt[i]);
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clk_put(clk);
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kfree(sinfo);
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err0:
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return ret;
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}
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static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
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{
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struct skt_dev_info *sinfo = platform_get_drvdata(dev);
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int i;
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platform_set_drvdata(dev, NULL);
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for (i = 0; i < sinfo->nskt; i++)
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soc_pcmcia_remove_one(&sinfo->skt[i]);
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clk_put(sinfo->clk);
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kfree(sinfo);
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return 0;
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}
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static int pxa2xx_drv_pcmcia_resume(struct device *dev)
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{
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pxa2xx_configure_sockets(dev);
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return 0;
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}
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static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
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.resume = pxa2xx_drv_pcmcia_resume,
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};
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static struct platform_driver pxa2xx_pcmcia_driver = {
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.probe = pxa2xx_drv_pcmcia_probe,
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.remove = pxa2xx_drv_pcmcia_remove,
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.driver = {
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.name = "pxa2xx-pcmcia",
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.owner = THIS_MODULE,
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.pm = &pxa2xx_drv_pcmcia_pm_ops,
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},
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};
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static int __init pxa2xx_pcmcia_init(void)
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{
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return platform_driver_register(&pxa2xx_pcmcia_driver);
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}
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|
|
|
static void __exit pxa2xx_pcmcia_exit(void)
|
|
{
|
|
platform_driver_unregister(&pxa2xx_pcmcia_driver);
|
|
}
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|
|
|
fs_initcall(pxa2xx_pcmcia_init);
|
|
module_exit(pxa2xx_pcmcia_exit);
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|
|
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MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
|
|
MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:pxa2xx-pcmcia");
|