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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 ...
269 lines
7.4 KiB
C
269 lines
7.4 KiB
C
/*======================================================================
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Device driver for the PCMCIA control functionality of StrongARM
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SA-1100 microprocessors.
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The contents of this file are subject to the Mozilla Public
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License Version 1.1 (the "License"); you may not use this file
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except in compliance with the License. You may obtain a copy of
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the License at http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS
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IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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implied. See the License for the specific language governing
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rights and limitations under the License.
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The initial developer of the original code is John G. Dorsey
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<john+@cs.cmu.edu>. Portions created by John G. Dorsey are
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Copyright (C) 1999 John G. Dorsey. All Rights Reserved.
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Alternatively, the contents of this file may be used under the
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terms of the GNU Public License version 2 (the "GPL"), in which
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case the provisions of the GPL are applicable instead of the
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above. If you wish to allow the use of your version of this file
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only under the terms of the GPL and not to allow others to use
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your version of this file under the MPL, indicate your decision
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by deleting the provisions above and replace them with the notice
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and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this
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file under either the MPL or the GPL.
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======================================================================*/
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#include <linux/module.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/io.h>
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#include <linux/slab.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include "soc_common.h"
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#include "sa11xx_base.h"
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/*
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* sa1100_pcmcia_default_mecr_timing
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* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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*
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* Calculate MECR clock wait states for given CPU clock
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* speed and command wait state. This function can be over-
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* written by a board specific version.
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*
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* The default is to simply calculate the BS values as specified in
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* the INTEL SA1100 development manual
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* "Expansion Memory (PCMCIA) Configuration Register (MECR)"
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* that's section 10.2.5 in _my_ version of the manual ;)
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*/
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static unsigned int
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sa1100_pcmcia_default_mecr_timing(struct soc_pcmcia_socket *skt,
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unsigned int cpu_speed,
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unsigned int cmd_time)
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{
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return sa1100_pcmcia_mecr_bs(cmd_time, cpu_speed);
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}
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/* sa1100_pcmcia_set_mecr()
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* ^^^^^^^^^^^^^^^^^^^^^^^^
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*
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* set MECR value for socket <sock> based on this sockets
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* io, mem and attribute space access speed.
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* Call board specific BS value calculation to allow boards
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* to tweak the BS values.
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*/
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static int
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sa1100_pcmcia_set_mecr(struct soc_pcmcia_socket *skt, unsigned int cpu_clock)
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{
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struct soc_pcmcia_timing timing;
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u32 mecr, old_mecr;
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unsigned long flags;
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unsigned int bs_io, bs_mem, bs_attr;
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soc_common_pcmcia_get_timing(skt, &timing);
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bs_io = skt->ops->get_timing(skt, cpu_clock, timing.io);
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bs_mem = skt->ops->get_timing(skt, cpu_clock, timing.mem);
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bs_attr = skt->ops->get_timing(skt, cpu_clock, timing.attr);
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local_irq_save(flags);
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old_mecr = mecr = MECR;
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MECR_FAST_SET(mecr, skt->nr, 0);
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MECR_BSIO_SET(mecr, skt->nr, bs_io);
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MECR_BSA_SET(mecr, skt->nr, bs_attr);
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MECR_BSM_SET(mecr, skt->nr, bs_mem);
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if (old_mecr != mecr)
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MECR = mecr;
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local_irq_restore(flags);
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debug(skt, 2, "FAST %X BSM %X BSA %X BSIO %X\n",
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MECR_FAST_GET(mecr, skt->nr),
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MECR_BSM_GET(mecr, skt->nr), MECR_BSA_GET(mecr, skt->nr),
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MECR_BSIO_GET(mecr, skt->nr));
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return 0;
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}
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#ifdef CONFIG_CPU_FREQ
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static int
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sa1100_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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sa1100_pcmcia_set_mecr(skt, freqs->new);
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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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sa1100_pcmcia_set_mecr(skt, freqs->new);
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break;
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case CPUFREQ_RESUMECHANGE:
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sa1100_pcmcia_set_mecr(skt, freqs->new);
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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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static int
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sa1100_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
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{
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return sa1100_pcmcia_set_mecr(skt, cpufreq_get(0));
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}
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static int
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sa1100_pcmcia_show_timing(struct soc_pcmcia_socket *skt, char *buf)
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{
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struct soc_pcmcia_timing timing;
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unsigned int clock = cpufreq_get(0);
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unsigned long mecr = MECR;
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char *p = buf;
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soc_common_pcmcia_get_timing(skt, &timing);
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p+=sprintf(p, "I/O : %u (%u)\n", timing.io,
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sa1100_pcmcia_cmd_time(clock, MECR_BSIO_GET(mecr, skt->nr)));
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p+=sprintf(p, "attribute: %u (%u)\n", timing.attr,
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sa1100_pcmcia_cmd_time(clock, MECR_BSA_GET(mecr, skt->nr)));
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p+=sprintf(p, "common : %u (%u)\n", timing.mem,
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sa1100_pcmcia_cmd_time(clock, MECR_BSM_GET(mecr, skt->nr)));
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return p - buf;
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}
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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 sa11xx_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(sa11xx_drv_pcmcia_add_one);
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void sa11xx_drv_pcmcia_ops(struct pcmcia_low_level *ops)
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{
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/*
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* set default MECR calculation if the board specific
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* code did not specify one...
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*/
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if (!ops->get_timing)
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ops->get_timing = sa1100_pcmcia_default_mecr_timing;
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/* Provide our SA11x0 specific timing routines. */
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ops->set_timing = sa1100_pcmcia_set_timing;
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ops->show_timing = sa1100_pcmcia_show_timing;
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#ifdef CONFIG_CPU_FREQ
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ops->frequency_change = sa1100_pcmcia_frequency_change;
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#endif
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}
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EXPORT_SYMBOL(sa11xx_drv_pcmcia_ops);
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int sa11xx_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops,
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int first, int nr)
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{
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struct skt_dev_info *sinfo;
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struct soc_pcmcia_socket *skt;
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int i, ret = 0;
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sa11xx_drv_pcmcia_ops(ops);
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sinfo = kzalloc(SKT_DEV_INFO_SIZE(nr), GFP_KERNEL);
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if (!sinfo)
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return -ENOMEM;
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sinfo->nskt = nr;
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/* Initialize processor specific parameters */
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for (i = 0; i < nr; i++) {
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skt = &sinfo->skt[i];
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skt->nr = first + i;
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soc_pcmcia_init_one(skt, ops, dev);
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ret = sa11xx_drv_pcmcia_add_one(skt);
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if (ret)
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break;
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}
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if (ret) {
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while (--i >= 0)
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soc_pcmcia_remove_one(&sinfo->skt[i]);
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kfree(sinfo);
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} else {
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dev_set_drvdata(dev, sinfo);
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}
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return ret;
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}
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EXPORT_SYMBOL(sa11xx_drv_pcmcia_probe);
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static int __init sa11xx_pcmcia_init(void)
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{
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return 0;
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}
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fs_initcall(sa11xx_pcmcia_init);
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static void __exit sa11xx_pcmcia_exit(void) {}
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module_exit(sa11xx_pcmcia_exit);
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MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>");
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MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11xx core socket driver");
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MODULE_LICENSE("Dual MPL/GPL");
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