1 files changed, 200 insertions, 0 deletions

diff --git a/drivers/pcmcia/sa11xx_base.c b/drivers/pcmcia/sa11xx_base.c
new file mode 100644
index 000000000000..db04ffb6f68c
--- /dev/null
+++ b/drivers/pcmcia/sa11xx_base.c
@@ -0,0 +1,200 @@
+/*======================================================================
+
+    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/config.h>
+#include <linux/cpufreq.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware.h>
+#include <asm/io.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;
+}
+
+int sa11xx_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops,
+                            int first, int nr)
+{
+        /*
+         * 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
+
+        return soc_common_drv_pcmcia_probe(dev, ops, first, nr);
+}
+EXPORT_SYMBOL(sa11xx_drv_pcmcia_probe);
+
+static int __init sa11xx_pcmcia_init(void)
+{
+        return 0;
+}
+module_init(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");