1 files changed, 254 insertions, 0 deletions

diff --git a/drivers/pcmcia/pxa2xx_base.c b/drivers/pcmcia/pxa2xx_base.c
new file mode 100644
index 000000000000..a6936a75a87e
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_base.c
@@ -0,0 +1,254 @@
+/*======================================================================
+
+  Device driver for the PCMCIA control functionality of PXA2xx
+  microprocessors.
+
+    The contents of this file may be used under the
+    terms of the GNU Public License version 2 (the "GPL")
+
+    (c) Ian Molton (spyro@f2s.com) 2003
+    (c) Stefan Eletzhofer (stefan.eletzhofer@inquant.de) 2003,4
+
+    derived from sa11xx_base.c
+
+     Portions created by John G. Dorsey are
+     Copyright (C) 1999 John G. Dorsey.
+
+  ======================================================================*/
+
+#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 <asm/arch/pxa-regs.h>
+
+#include <pcmcia/cs_types.h>
+#include <pcmcia/ss.h>
+#include <pcmcia/bulkmem.h>
+#include <pcmcia/cistpl.h>
+
+#include "cs_internal.h"
+#include "soc_common.h"
+#include "pxa2xx_base.h"
+
+
+#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)
+
+static inline u_int pxa2xx_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 pxa2xx_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 pxa2xx_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 (approximate) command assertion period, in
+ * nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
+ */
+static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
+                                           u_int pcmcia_mcxx_asst)
+{
+        return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
+}
+
+static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock )
+{
+        MCMEM(sock) = ((pxa2xx_mcxx_setup(speed, clock)
+                & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
+                | ((pxa2xx_mcxx_asst(speed, clock)
+                & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
+                | ((pxa2xx_mcxx_hold(speed, clock)
+                & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
+
+        return 0;
+}
+
+static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
+{
+        MCIO(sock) = ((pxa2xx_mcxx_setup(speed, clock)
+                & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
+                | ((pxa2xx_mcxx_asst(speed, clock)
+                & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
+                | ((pxa2xx_mcxx_hold(speed, clock)
+                & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
+
+        return 0;
+}
+
+static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
+{
+        MCATT(sock) = ((pxa2xx_mcxx_setup(speed, clock)
+                & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
+                | ((pxa2xx_mcxx_asst(speed, clock)
+                & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
+                | ((pxa2xx_mcxx_hold(speed, clock)
+                & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
+
+        return 0;
+}
+
+static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int clk)
+{
+        struct soc_pcmcia_timing timing;
+        int sock = skt->nr;
+
+        soc_common_pcmcia_get_timing(skt, &timing);
+
+        pxa2xx_pcmcia_set_mcmem(sock, timing.mem, clk);
+        pxa2xx_pcmcia_set_mcatt(sock, timing.attr, clk);
+        pxa2xx_pcmcia_set_mcio(sock, timing.io, clk);
+
+        return 0;
+}
+
+static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
+{
+        unsigned int clk = get_memclk_frequency_10khz();
+        return pxa2xx_pcmcia_set_mcxx(skt, clk);
+}
+
+#ifdef CONFIG_CPU_FREQ
+
+static int
+pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
+                               unsigned long val,
+                               struct cpufreq_freqs *freqs)
+{
+#warning "it's not clear if this is right since the core CPU (N) clock has no effect on the memory (L) clock"
+        switch (val) {
+        case CPUFREQ_PRECHANGE:
+                if (freqs->new > freqs->old) {
+                        debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
+                               "pre-updating\n",
+                               freqs->new / 1000, (freqs->new / 100) % 10,
+                               freqs->old / 1000, (freqs->old / 100) % 10);
+                        pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
+                }
+                break;
+
+        case CPUFREQ_POSTCHANGE:
+                if (freqs->new < freqs->old) {
+                        debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
+                               "post-updating\n",
+                               freqs->new / 1000, (freqs->new / 100) % 10,
+                               freqs->old / 1000, (freqs->old / 100) % 10);
+                        pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
+                }
+                break;
+        }
+        return 0;
+}
+#endif
+
+int pxa2xx_drv_pcmcia_probe(struct device *dev)
+{
+        int ret;
+        struct pcmcia_low_level *ops;
+        int first, nr;
+
+        if (!dev || !dev->platform_data)
+                return -ENODEV;
+
+        ops = (struct pcmcia_low_level *)dev->platform_data;
+        first = ops->first;
+        nr = ops->nr;
+
+        /* Provide our PXA2xx specific timing routines. */
+        ops->set_timing  = pxa2xx_pcmcia_set_timing;
+#ifdef CONFIG_CPU_FREQ
+        ops->frequency_change = pxa2xx_pcmcia_frequency_change;
+#endif
+
+        ret = soc_common_drv_pcmcia_probe(dev, ops, first, nr);
+
+        if (ret == 0) {
+                /*
+                 * We have at least one socket, so set MECR:CIT
+                 * (Card Is There)
+                 */
+                MECR |= MECR_CIT;
+
+                /* Set MECR:NOS (Number Of Sockets) */
+                if (nr > 1)
+                        MECR |= MECR_NOS;
+                else
+                        MECR &= ~MECR_NOS;
+        }
+
+        return ret;
+}
+EXPORT_SYMBOL(pxa2xx_drv_pcmcia_probe);
+
+static int pxa2xx_drv_pcmcia_suspend(struct device *dev, u32 state, u32 level)
+{
+        int ret = 0;
+        if (level == SUSPEND_SAVE_STATE)
+                ret = pcmcia_socket_dev_suspend(dev, state);
+        return ret;
+}
+
+static int pxa2xx_drv_pcmcia_resume(struct device *dev, u32 level)
+{
+        int ret = 0;
+        if (level == RESUME_RESTORE_STATE)
+        {
+                struct pcmcia_low_level *ops = dev->platform_data;
+                int nr = ops ? ops->nr : 0;
+
+                MECR = nr > 1 ? MECR_CIT | MECR_NOS : (nr > 0 ? MECR_CIT : 0);
+                ret = pcmcia_socket_dev_resume(dev);
+        }
+        return ret;
+}
+
+static struct device_driver pxa2xx_pcmcia_driver = {
+        .probe          = pxa2xx_drv_pcmcia_probe,
+        .remove         = soc_common_drv_pcmcia_remove,
+        .suspend        = pxa2xx_drv_pcmcia_suspend,
+        .resume         = pxa2xx_drv_pcmcia_resume,
+        .name           = "pxa2xx-pcmcia",
+        .bus            = &platform_bus_type,
+};
+
+static int __init pxa2xx_pcmcia_init(void)
+{
+        return driver_register(&pxa2xx_pcmcia_driver);
+}
+
+static void __exit pxa2xx_pcmcia_exit(void)
+{
+        driver_unregister(&pxa2xx_pcmcia_driver);
+}
+
+module_init(pxa2xx_pcmcia_init);
+module_exit(pxa2xx_pcmcia_exit);
+
+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");