| /*====================================================================== |
| |
| Device driver for the PCMCIA control functionality of StrongARM |
| SA-1100 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. |
| |
| ======================================================================*/ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/cpufreq.h> |
| #include <linux/ioport.h> |
| #include <linux/kernel.h> |
| #include <linux/spinlock.h> |
| #include <linux/io.h> |
| #include <linux/slab.h> |
| |
| #include <mach/hardware.h> |
| #include <asm/irq.h> |
| #include <asm/system.h> |
| |
| #include "soc_common.h" |
| #include "sa11xx_base.h" |
| |
| |
| /* |
| * sa1100_pcmcia_default_mecr_timing |
| * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| * |
| * Calculate MECR clock wait states for given CPU clock |
| * speed and command wait state. This function can be over- |
| * written by a board specific version. |
| * |
| * The default is to simply calculate the BS values as specified in |
| * the INTEL SA1100 development manual |
| * "Expansion Memory (PCMCIA) Configuration Register (MECR)" |
| * that's section 10.2.5 in _my_ version of the manual ;) |
| */ |
| static unsigned int |
| sa1100_pcmcia_default_mecr_timing(struct soc_pcmcia_socket *skt, |
| unsigned int cpu_speed, |
| unsigned int cmd_time) |
| { |
| return sa1100_pcmcia_mecr_bs(cmd_time, cpu_speed); |
| } |
| |
| /* sa1100_pcmcia_set_mecr() |
| * ^^^^^^^^^^^^^^^^^^^^^^^^ |
| * |
| * set MECR value for socket <sock> based on this sockets |
| * io, mem and attribute space access speed. |
| * Call board specific BS value calculation to allow boards |
| * to tweak the BS values. |
| */ |
| static int |
| sa1100_pcmcia_set_mecr(struct soc_pcmcia_socket *skt, unsigned int cpu_clock) |
| { |
| struct soc_pcmcia_timing timing; |
| u32 mecr, old_mecr; |
| unsigned long flags; |
| unsigned int bs_io, bs_mem, bs_attr; |
| |
| soc_common_pcmcia_get_timing(skt, &timing); |
| |
| bs_io = skt->ops->get_timing(skt, cpu_clock, timing.io); |
| bs_mem = skt->ops->get_timing(skt, cpu_clock, timing.mem); |
| bs_attr = skt->ops->get_timing(skt, cpu_clock, timing.attr); |
| |
| local_irq_save(flags); |
| |
| old_mecr = mecr = MECR; |
| MECR_FAST_SET(mecr, skt->nr, 0); |
| MECR_BSIO_SET(mecr, skt->nr, bs_io); |
| MECR_BSA_SET(mecr, skt->nr, bs_attr); |
| MECR_BSM_SET(mecr, skt->nr, bs_mem); |
| if (old_mecr != mecr) |
| MECR = mecr; |
| |
| local_irq_restore(flags); |
| |
| debug(skt, 2, "FAST %X BSM %X BSA %X BSIO %X\n", |
| MECR_FAST_GET(mecr, skt->nr), |
| MECR_BSM_GET(mecr, skt->nr), MECR_BSA_GET(mecr, skt->nr), |
| MECR_BSIO_GET(mecr, skt->nr)); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_CPU_FREQ |
| static int |
| sa1100_pcmcia_frequency_change(struct soc_pcmcia_socket *skt, |
| unsigned long val, |
| struct cpufreq_freqs *freqs) |
| { |
| switch (val) { |
| case CPUFREQ_PRECHANGE: |
| if (freqs->new > freqs->old) |
| sa1100_pcmcia_set_mecr(skt, freqs->new); |
| break; |
| |
| case CPUFREQ_POSTCHANGE: |
| if (freqs->new < freqs->old) |
| sa1100_pcmcia_set_mecr(skt, freqs->new); |
| break; |
| case CPUFREQ_RESUMECHANGE: |
| sa1100_pcmcia_set_mecr(skt, freqs->new); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| #endif |
| |
| static int |
| sa1100_pcmcia_set_timing(struct soc_pcmcia_socket *skt) |
| { |
| return sa1100_pcmcia_set_mecr(skt, cpufreq_get(0)); |
| } |
| |
| static int |
| sa1100_pcmcia_show_timing(struct soc_pcmcia_socket *skt, char *buf) |
| { |
| struct soc_pcmcia_timing timing; |
| unsigned int clock = cpufreq_get(0); |
| unsigned long mecr = MECR; |
| char *p = buf; |
| |
| soc_common_pcmcia_get_timing(skt, &timing); |
| |
| p+=sprintf(p, "I/O : %u (%u)\n", timing.io, |
| sa1100_pcmcia_cmd_time(clock, MECR_BSIO_GET(mecr, skt->nr))); |
| |
| p+=sprintf(p, "attribute: %u (%u)\n", timing.attr, |
| sa1100_pcmcia_cmd_time(clock, MECR_BSA_GET(mecr, skt->nr))); |
| |
| p+=sprintf(p, "common : %u (%u)\n", timing.mem, |
| sa1100_pcmcia_cmd_time(clock, MECR_BSM_GET(mecr, skt->nr))); |
| |
| return p - buf; |
| } |
| |
| static const char *skt_names[] = { |
| "PCMCIA socket 0", |
| "PCMCIA socket 1", |
| }; |
| |
| #define SKT_DEV_INFO_SIZE(n) \ |
| (sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket)) |
| |
| int sa11xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt) |
| { |
| skt->res_skt.start = _PCMCIA(skt->nr); |
| skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1; |
| skt->res_skt.name = skt_names[skt->nr]; |
| skt->res_skt.flags = IORESOURCE_MEM; |
| |
| skt->res_io.start = _PCMCIAIO(skt->nr); |
| skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1; |
| skt->res_io.name = "io"; |
| skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| |
| skt->res_mem.start = _PCMCIAMem(skt->nr); |
| skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1; |
| skt->res_mem.name = "memory"; |
| skt->res_mem.flags = IORESOURCE_MEM; |
| |
| skt->res_attr.start = _PCMCIAAttr(skt->nr); |
| skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1; |
| skt->res_attr.name = "attribute"; |
| skt->res_attr.flags = IORESOURCE_MEM; |
| |
| return soc_pcmcia_add_one(skt); |
| } |
| EXPORT_SYMBOL(sa11xx_drv_pcmcia_add_one); |
| |
| void sa11xx_drv_pcmcia_ops(struct pcmcia_low_level *ops) |
| { |
| /* |
| * set default MECR calculation if the board specific |
| * code did not specify one... |
| */ |
| if (!ops->get_timing) |
| ops->get_timing = sa1100_pcmcia_default_mecr_timing; |
| |
| /* Provide our SA11x0 specific timing routines. */ |
| ops->set_timing = sa1100_pcmcia_set_timing; |
| ops->show_timing = sa1100_pcmcia_show_timing; |
| #ifdef CONFIG_CPU_FREQ |
| ops->frequency_change = sa1100_pcmcia_frequency_change; |
| #endif |
| } |
| EXPORT_SYMBOL(sa11xx_drv_pcmcia_ops); |
| |
| int sa11xx_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, |
| int first, int nr) |
| { |
| struct skt_dev_info *sinfo; |
| struct soc_pcmcia_socket *skt; |
| int i, ret = 0; |
| |
| sa11xx_drv_pcmcia_ops(ops); |
| |
| sinfo = kzalloc(SKT_DEV_INFO_SIZE(nr), GFP_KERNEL); |
| if (!sinfo) |
| return -ENOMEM; |
| |
| sinfo->nskt = nr; |
| |
| /* Initialize processor specific parameters */ |
| for (i = 0; i < nr; i++) { |
| skt = &sinfo->skt[i]; |
| |
| skt->nr = first + i; |
| soc_pcmcia_init_one(skt, ops, dev); |
| |
| ret = sa11xx_drv_pcmcia_add_one(skt); |
| if (ret) |
| break; |
| } |
| |
| if (ret) { |
| while (--i >= 0) |
| soc_pcmcia_remove_one(&sinfo->skt[i]); |
| kfree(sinfo); |
| } else { |
| dev_set_drvdata(dev, sinfo); |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(sa11xx_drv_pcmcia_probe); |
| |
| static int __init sa11xx_pcmcia_init(void) |
| { |
| return 0; |
| } |
| fs_initcall(sa11xx_pcmcia_init); |
| |
| static void __exit sa11xx_pcmcia_exit(void) {} |
| |
| module_exit(sa11xx_pcmcia_exit); |
| |
| MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>"); |
| MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11xx core socket driver"); |
| MODULE_LICENSE("Dual MPL/GPL"); |