[PATCH 3/3] ep93xx pcmcia support for the contec micro9 board
Lennert Buytenhek
buytenh at wantstofly.org
Mon Apr 30 09:27:23 EDT 2007
Signed-off-by: Lennert Buytenhek <buytenh at wantstofly.org>
Index: linux-2.6.20/arch/arm/mach-ep93xx/micro9.c
===================================================================
--- linux-2.6.20.orig/arch/arm/mach-ep93xx/micro9.c
+++ linux-2.6.20/arch/arm/mach-ep93xx/micro9.c
@@ -16,12 +16,14 @@
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
+#include <linux/delay.h>
#include <linux/mtd/physmap.h>
#include <asm/io.h>
#include <asm/hardware.h>
+#include <asm/arch/gpio.h>
#include <asm/mach/arch.h>
#include <asm/mach-types.h>
@@ -92,11 +94,63 @@ static void __init micro9h_init(void)
platform_device_register(µ9h_flash);
}
+void micro9_tps2206_write(int val)
+{
+ int i;
+
+ eeclk_eedat_claim();
+
+ /*
+ * First pull EECLK low, so that transitions on EEDAT
+ * don't cause start or stop conditions.
+ */
+ gpio_line_config(EP93XX_GPIO_LINE_EECLK, GPIO_OUT);
+ gpio_line_set(EP93XX_GPIO_LINE_EECLK, 0);
+ udelay(1);
+
+ for (i = 8; i >= 0; i--) {
+ if (val & (1 << i))
+ gpio_line_config(EP93XX_GPIO_LINE_EEDAT, GPIO_IN);
+ else {
+ gpio_line_config(EP93XX_GPIO_LINE_EEDAT, GPIO_OUT);
+ gpio_line_set(EP93XX_GPIO_LINE_EEDAT, 0);
+ }
+ udelay(1);
+
+ gpio_line_config(EP93XX_GPIO_LINE_EECLK, GPIO_IN);
+ udelay(1);
+ gpio_line_config(EP93XX_GPIO_LINE_EECLK, GPIO_OUT);
+ gpio_line_set(EP93XX_GPIO_LINE_EECLK, 0);
+ }
+ udelay(1);
+ gpio_line_set(EP93XX_GPIO_LINE_SLA0, 1);
+ udelay(1);
+ gpio_line_set(EP93XX_GPIO_LINE_SLA0, 0);
+
+ gpio_line_config(EP93XX_GPIO_LINE_EEDAT, GPIO_IN);
+ udelay(1);
+ gpio_line_config(EP93XX_GPIO_LINE_EECLK, GPIO_IN);
+
+ eeclk_eedat_release();
+}
+
+static void micro9_tps2206_init(void)
+{
+ gpio_line_config(EP93XX_GPIO_LINE_EECLK, GPIO_IN);
+ gpio_line_config(EP93XX_GPIO_LINE_EEDAT, GPIO_IN);
+
+ gpio_line_set(EP93XX_GPIO_LINE_SLA0, 0);
+ gpio_line_config(EP93XX_GPIO_LINE_SLA0, GPIO_OUT);
+
+ micro9_tps2206_write(0);
+}
+
static void __init micro9h_init_machine(void)
{
ep93xx_init_devices();
micro9_init();
micro9h_init();
+ micro9_tps2206_init();
}
MACHINE_START(MICRO9, "Contec Hypercontrol Micro9-H")
@@ -154,4 +208,3 @@ MACHINE_START(MICRO9L, "Contec Hypercont
.init_machine = micro9l_init_machine,
MACHINE_END
#endif
-
Index: linux-2.6.20/drivers/pcmcia/Makefile
===================================================================
--- linux-2.6.20.orig/drivers/pcmcia/Makefile
+++ linux-2.6.20/drivers/pcmcia/Makefile
@@ -56,6 +56,7 @@ au1x00_ss-$(CONFIG_MIPS_DB1550) += au1
au1x00_ss-$(CONFIG_MIPS_XXS1500) += au1000_xxs1500.o
ep93xx_cs-$(CONFIG_MACH_ADSSPHERE) += ep93xx_adssphere.o
+ep93xx_cs-$(CONFIG_MACH_MICRO9) += ep93xx_micro9.o
sa1111_cs-y += sa1111_generic.o
sa1111_cs-$(CONFIG_ASSABET_NEPONSET) += sa1100_neponset.o
Index: linux-2.6.20/drivers/pcmcia/ep93xx_micro9.c
===================================================================
--- /dev/null
+++ linux-2.6.20/drivers/pcmcia/ep93xx_micro9.c
@@ -0,0 +1,182 @@
+/*
+ * linux/drivers/pcmcia/ep93xx_micro9.c
+ * Copyright (C) 2007 Lennert Buytenhek <buytenh at wantstofly.org>
+ *
+ * Adapted from ep93xx_adssphere.c, which is:
+ * Copyright (C) 2005 Robert Whaley <rwhaley at applieddata.net>
+ *
+ * Adapted from pxa27x_mainstone.c, which is:
+ * Copyright (C) 2004 MontaVista Software Inc.
+ *
+ * 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/errno.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <pcmcia/ss.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/arch/gpio.h>
+#include <asm/mach-types.h>
+#include "soc_common.h"
+
+#define EP93XX_GPIO_PFDR EP93XX_GPIO_REG(0x30)
+
+#define PCMCIACNT (EP93XX_PCMCIA_CONTROLLER_BASE + 0x40)
+
+#define TPS2206_NOT_SHUTDOWN 0x0100
+#define TPS2206_BVCC_0V 0x0000
+#define TPS2206_BVCC_5V 0x0040
+#define TPS2206_BVCC_3V3 0x0080
+#define TPS2206_BVPP_0V 0x0000
+#define TPS2206_BVPP_12V 0x0010
+#define TPS2206_BVPP_VCC 0x0020
+#define TPS2206_BVPP_HIGHZ 0x0030
+#define TPS2206_AVCC_0V 0x0000
+#define TPS2206_AVCC_3V3 0x0004
+#define TPS2206_AVCC_5V 0x0008
+#define TPS2206_AVPP_0V 0x0000
+#define TPS2206_AVPP_12V 0x0001
+#define TPS2206_AVPP_VCC 0x0002
+#define TPS2206_AVPP_HIGHZ 0x0003
+
+
+static struct pcmcia_irqs irqs[] = {
+ { 0, IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_MCCD1), "PCMCIA CD1" },
+ { 0, IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_MCCD2), "PCMCIA CD2" },
+ { 0, IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_MCBVD1), "PCMCIA STSCHG/BVD1" },
+ { 0, IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_MCBVD2), "PCMCIA SPKR/BVD2" },
+};
+
+static int micro9_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ if (skt->nr == 0) {
+ skt->irq = IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_READY);
+ return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+ }
+
+ return -ENXIO;
+}
+
+static void micro9_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+ soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void micro9_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+ struct pcmcia_state *state)
+{
+ unsigned long status;
+
+ status = readl(EP93XX_GPIO_PFDR);
+ state->detect = (status & 0x06) ? 0 : 1;
+ state->ready = (status & 0x40) ? 1 : 0;
+ state->wrprot = (status & 0x01) ? 0 : 1;
+ state->bvd1 = (status & 0x08) ? 1 : 0;
+ state->bvd2 = (status & 0x10) ? 1 : 0;
+ state->vs_3v = (status & 0x20) ? 0 : 1;
+ state->vs_Xv = (status & 0x80) ? 0 : 1;
+}
+
+static int micro9_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ int val;
+
+ if (skt->nr != 0) {
+ printk(KERN_ERR "%s: socket %u invalid\n", __func__, skt->nr);
+ return -1;
+ }
+
+ val = TPS2206_NOT_SHUTDOWN;
+ if (state->Vcc == 0) {
+ val |= TPS2206_AVCC_0V;
+ } else if (state->Vcc == 33) {
+ val |= TPS2206_AVCC_3V3;
+ } else if (state->Vcc == 50) {
+ val |= TPS2206_AVCC_5V;
+ } else {
+ printk(KERN_ERR "%s: bad Vcc %u\n", __FUNCTION__, state->Vcc);
+ val &= ~TPS2206_NOT_SHUTDOWN;
+ }
+ if (state->Vpp == 0) {
+ val |= TPS2206_AVPP_0V;
+ } else if (state->Vpp == state->Vcc) {
+ val |= TPS2206_AVPP_VCC;
+ } else if (state->Vpp == 120) {
+ val |= TPS2206_AVPP_12V;
+ } else {
+ printk(KERN_ERR "%s: bad Vpp %u\n", __FUNCTION__, state->Vpp);
+ val &= ~TPS2206_NOT_SHUTDOWN;
+ }
+
+ micro9_tps2206_write(val);
+
+ if (state->flags & SS_RESET)
+ /* see EP93xx User's Guide */
+ writel(0x15, PCMCIACNT);
+ else
+ /* CF mode - BIT1 for PCMCIA mode */
+ writel(0x11, PCMCIACNT);
+
+ return 0;
+}
+
+static void micro9_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+ soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void micro9_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+ soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static struct pcmcia_low_level micro9_pcmcia_ops = {
+ .owner = THIS_MODULE,
+ .hw_init = micro9_pcmcia_hw_init,
+ .hw_shutdown = micro9_pcmcia_hw_shutdown,
+ .socket_state = micro9_pcmcia_socket_state,
+ .configure_socket = micro9_pcmcia_configure_socket,
+ .socket_init = micro9_pcmcia_socket_init,
+ .socket_suspend = micro9_pcmcia_socket_suspend,
+ .nr = 1,
+};
+
+static struct platform_device micro9_pcmcia = {
+ .name = "ep93xx-pcmcia",
+ .id = -1,
+ .dev = {
+ .platform_data = µ9_pcmcia_ops,
+ },
+};
+
+static int __init micro9_pcmcia_init(void)
+{
+ int ret;
+
+ ret = 0;
+ if (machine_is_micro9())
+ ret = platform_device_register(µ9_pcmcia);
+
+ return ret;
+}
+
+static void __exit micro9_pcmcia_exit(void)
+{
+ if (machine_is_micro9())
+ platform_device_unregister(µ9_pcmcia);
+}
+
+module_init(micro9_pcmcia_init);
+module_exit(micro9_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
Index: linux-2.6.20/include/asm-arm/arch-ep93xx/hardware.h
===================================================================
--- linux-2.6.20.orig/include/asm-arm/arch-ep93xx/hardware.h
+++ linux-2.6.20/include/asm-arm/arch-ep93xx/hardware.h
@@ -10,4 +10,5 @@
#include "adssphere.h"
#include "gesbc9312.h"
+#include "micro9.h"
#include "ts72xx.h"
Index: linux-2.6.20/include/asm-arm/arch-ep93xx/micro9.h
===================================================================
--- /dev/null
+++ linux-2.6.20/include/asm-arm/arch-ep93xx/micro9.h
@@ -0,0 +1,7 @@
+/*
+ * linux/include/asm-arm/arch-ep93xx/micro9.h
+ */
+
+#ifndef __ASSEMBLY__
+void micro9_tps2206_write(int);
+#endif
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