[ARM] 5294/1: Trizeps4 PCMCIA support

Support for Trizeps4 SOM PCMCIA
with ConXS or other baseboards.
with double GPIO-free fixed (sorry!)

replaces 5279/1

Signed-off-by: Jurgen Schindele <linux@schindele.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 259 insertions, 1 deletions

diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index e0f884034c9f..40417d3fe50d 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -220,7 +220,7 @@ config PCMCIA_PXA2XX
         tristate "PXA2xx support"
         depends on ARM && ARCH_PXA && PCMCIA
         depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \
-                    || MACH_ARMCORE || ARCH_PXA_PALM)
+                    || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA)
         help
           Say Y here to include support for the PXA2xx PCMCIA controller
 
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index 269a9e913ba2..fcef17082905 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -71,6 +71,7 @@ sa1100_cs-$(CONFIG_SA1100_SIMPAD)		+= sa1100_simpad.o
 pxa2xx_cs-$(CONFIG_ARCH_LUBBOCK)                += pxa2xx_lubbock.o sa1111_generic.o
 pxa2xx_cs-$(CONFIG_MACH_MAINSTONE)              += pxa2xx_mainstone.o
 pxa2xx_cs-$(CONFIG_PXA_SHARPSL)                 += pxa2xx_sharpsl.o
+pxa2xx_cs-$(CONFIG_TRIZEPS_PCMCIA)              += pxa2xx_trizeps.o
 pxa2xx_cs-$(CONFIG_MACH_ARMCORE)                += pxa2xx_cm_x270.o
 pxa2xx_cs-$(CONFIG_MACH_PALMTX)         += pxa2xx_palmtx.o
 
diff --git a/drivers/pcmcia/pxa2xx_trizeps4.c b/drivers/pcmcia/pxa2xx_trizeps4.c
new file mode 100644
index 000000000000..3a9ab4a39652
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_trizeps4.c
@@ -0,0 +1,257 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_trizeps4.c
+ *
+ * TRIZEPS PCMCIA specific routines.
+ *
+ * Author:      Jürgen Schindele
+ * Created:     20 02, 2006
+ * Copyright:   Jürgen Schindele
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-types.h>
+#include <asm/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/pxa-regs.h>
+#include <mach/trizeps4.h>
+
+#include "soc_common.h"
+
+extern void board_pcmcia_power(int power);
+
+static struct pcmcia_irqs irqs[] = {
+        { 0, IRQ_GPIO(GPIO_PCD), "cs0_cd" }
+        /* on other baseboards we can have more inputs */
+};
+
+static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+        int ret, i;
+        /* we dont have voltage/card/ready detection
+         * so we dont need interrupts for it
+         */
+        switch (skt->nr) {
+        case 0:
+                if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {
+                        pr_err("%s: sock %d unable to request gpio %d\n", __func__,
+                                skt->nr, GPIO_PRDY);
+                        return -EBUSY;
+                }
+                if (gpio_direction_input(GPIO_PRDY) < 0) {
+                        pr_err("%s: sock %d unable to set input gpio %d\n", __func__,
+                                skt->nr, GPIO_PRDY);
+                        gpio_free(GPIO_PRDY);
+                        return -EINVAL;
+                }
+                skt->irq = IRQ_GPIO(GPIO_PRDY);
+                break;
+
+#ifndef CONFIG_MACH_TRIZEPS_CONXS
+        case 1:
+#endif
+        default:
+                break;
+        }
+        /* release the reset of this card */
+        pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->irq);
+
+        /* supplementory irqs for the socket */
+        for (i = 0; i < ARRAY_SIZE(irqs); i++) {
+                if (irqs[i].sock != skt->nr)
+                        continue;
+                if (gpio_request(IRQ_TO_GPIO(irqs[i].irq), irqs[i].str) < 0) {
+                        pr_err("%s: sock %d unable to request gpio %d\n",
+                                __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
+                        ret = -EBUSY;
+                        goto error;
+                }
+                if (gpio_direction_input(IRQ_TO_GPIO(irqs[i].irq)) < 0) {
+                        pr_err("%s: sock %d unable to set input gpio %d\n",
+                                __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
+                        ret = -EINVAL;
+                        goto error;
+                }
+        }
+        return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+
+error:
+        for (; i >= 0; i--) {
+                gpio_free(IRQ_TO_GPIO(irqs[i].irq));
+        }
+        return (ret);
+}
+
+static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+        int i;
+        /* free allocated gpio's */
+        gpio_free(GPIO_PRDY);
+        for (i = 0; i < ARRAY_SIZE(irqs); i++)
+                gpio_free(IRQ_TO_GPIO(irqs[i].irq));
+}
+
+static unsigned long trizeps_pcmcia_status[2];
+
+static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+                                struct pcmcia_state *state)
+{
+        unsigned short status = 0, change;
+        status = CFSR_readw();
+        change = (status ^ trizeps_pcmcia_status[skt->nr]) &
+                                ConXS_CFSR_BVD_MASK;
+        if (change) {
+                trizeps_pcmcia_status[skt->nr] = status;
+                if (status & ConXS_CFSR_BVD1) {
+                        /* enable_irq empty */
+                } else {
+                        /* disable_irq empty */
+                }
+        }
+
+        switch (skt->nr) {
+        case 0:
+                /* just fill in fix states */
+                state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
+                state->ready  = gpio_get_value(GPIO_PRDY) ? 1 : 0;
+                state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
+                state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
+                state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
+                state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
+                state->wrprot = 0;      /* not available */
+                break;
+
+#ifndef CONFIG_MACH_TRIZEPS_CONXS
+        /* on ConXS we only have one slot. Second is inactive */
+        case 1:
+                state->detect = 0;
+                state->ready  = 0;
+                state->bvd1   = 0;
+                state->bvd2   = 0;
+                state->vs_3v  = 0;
+                state->vs_Xv  = 0;
+                state->wrprot = 0;
+                break;
+
+#endif
+        }
+}
+
+static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+                                const socket_state_t *state)
+{
+        int ret = 0;
+        unsigned short power = 0;
+
+        /* we do nothing here just check a bit */
+        switch (state->Vcc) {
+        case 0:  power &= 0xfc; break;
+        case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
+        case 50:
+                pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
+                break;
+        default:
+                pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
+                ret = -1;
+        }
+
+        switch (state->Vpp) {
+        case 0:  power &= 0xf3; break;
+        case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
+        case 120:
+                pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
+                break;
+        default:
+                if (state->Vpp != state->Vcc) {
+                        pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
+                        ret = -1;
+                }
+        }
+
+        switch (skt->nr) {
+        case 0:                  /* we only have 3.3V */
+                board_pcmcia_power(power);
+                break;
+
+#ifndef CONFIG_MACH_TRIZEPS_CONXS
+        /* on ConXS we only have one slot. Second is inactive */
+        case 1:
+#endif
+        default:
+                break;
+        }
+
+        return ret;
+}
+
+static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+        /* default is on */
+        board_pcmcia_power(0x9);
+}
+
+static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+        board_pcmcia_power(0x0);
+}
+
+static struct pcmcia_low_level trizeps_pcmcia_ops = {
+        .owner                  = THIS_MODULE,
+        .hw_init                = trizeps_pcmcia_hw_init,
+        .hw_shutdown            = trizeps_pcmcia_hw_shutdown,
+        .socket_state           = trizeps_pcmcia_socket_state,
+        .configure_socket       = trizeps_pcmcia_configure_socket,
+        .socket_init            = trizeps_pcmcia_socket_init,
+        .socket_suspend         = trizeps_pcmcia_socket_suspend,
+#ifdef CONFIG_MACH_TRIZEPS_CONXS
+        .nr                     = 1,
+#else
+        .nr                     = 2,
+#endif
+        .first                  = 0,
+};
+
+static struct platform_device *trizeps_pcmcia_device;
+
+static int __init trizeps_pcmcia_init(void)
+{
+        int ret;
+
+        trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+        if (!trizeps_pcmcia_device)
+                return -ENOMEM;
+
+        ret = platform_device_add_data(trizeps_pcmcia_device,
+                        &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
+
+        if (ret == 0)
+                ret = platform_device_add(trizeps_pcmcia_device);
+
+        if (ret)
+                platform_device_put(trizeps_pcmcia_device);
+
+        return ret;
+}
+
+static void __exit trizeps_pcmcia_exit(void)
+{
+        int i;
+        platform_device_unregister(trizeps_pcmcia_device);
+}
+
+fs_initcall(trizeps_pcmcia_init);
+module_exit(trizeps_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juergen Schindele");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");