Dear developpers,
i wrote a PCMCIA-driver for Trizeps4-SoM together with
ConXS-Evalboard from Keith&Koep. I commited it to arm-linux
patch system from Russel King.
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=3667/1
Can you clever guys please comment and review this patch
which i attatched here for convenience
Thanks
Jürgen Schindele
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index 4276965..143f193 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -69,4 +69,5 @@ sa1100_cs-$(CONFIG_SA1100_SIMPAD) += sa
pxa2xx_cs-$(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_MACH_TRIZEPS4) += pxa2xx_trizeps4.o
diff --git a/drivers/pcmcia/pxa2xx_trizeps4.c b/drivers/pcmcia/pxa2xx_trizeps4.c
new file mode 100644
index 0000000..dd219a7
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_trizeps4.c
@@ -0,0 +1,234 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_trizeps4.c
+ *
+ * TRIZEPS4 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/errno.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#include <pcmcia/ss.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/trizeps4.h>
+
+#include "soc_common.h"
+
+extern void board_pcmcia_power(int power);
+
+static struct pcmcia_irqs irqs[] = {
+ { 0, TRIZEPS4_CD_IRQ, "PCMCIA0 CD" }
+};
+
+static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ /* we dont have voltage/card/ready detection
+ * so we dont need interrupts for it
+ * TODO set default state on power
+ */
+ /*
+ * Setup default state of GPIO outputs
+ * before we enable them as outputs.
+ */
+ GPSR(GPIO48_nPOE) =
+ GPIO_bit(GPIO48_nPOE) |
+ GPIO_bit(GPIO49_nPWE) |
+ GPIO_bit(GPIO50_nPIOR) |
+ GPIO_bit(GPIO51_nPIOW) |
+ GPIO_bit(GPIO54_nPCE_2);
+
+ GPSR(GPIO102_nPCE_1) = GPIO102_nPCE_1;
+
+ pxa_gpio_mode(GPIO48_nPOE_MD);
+ pxa_gpio_mode(GPIO49_nPWE_MD);
+ pxa_gpio_mode(GPIO50_nPIOR_MD);
+ pxa_gpio_mode(GPIO51_nPIOW_MD);
+ pxa_gpio_mode(GPIO102_nPCE_1_MD);
+ pxa_gpio_mode(GPIO54_nPCE_2_MD);
+ pxa_gpio_mode(GPIO104_pSKTSEL_MD);
+ pxa_gpio_mode(GPIO55_nPREG_MD);
+ pxa_gpio_mode(GPIO56_nPWAIT_MD);
+ pxa_gpio_mode(GPIO57_nIOIS16_MD);
+ /* card detect */
+ pxa_gpio_mode(GPIO_PCD | GPIO_IN);
+ /* card interrupt */
+ pxa_gpio_mode(GPIO_PRDY | GPIO_IN);
+
+ switch (skt->nr) {
+ case 0:
+ skt->irq = TRIZEPS4_READY_NINT;
+ break;
+
+ case 1:
+ default:
+ break;
+ }
+ /* release the reset of this card */
+ /* FIXME Remove Card Reset ?? */
+ printk(KERN_DEBUG "%s: sock %d irq %d\n", __FUNCTION__, skt->nr, skt->irq);
+
+ /* supplementory irqs for the socket */
+ /* FIXME are interrupts delivered by ConXS Board ?? */
+ return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+ /* nothing to do */
+}
+
+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;
+#ifdef CONFIG_MACH_TRIZEPS4_CONXS
+ status = ConXS_CFSR;
+ 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 = (GPLR(GPIO_PCD) & GPIO_bit(GPIO_PCD)) ? 0 : 1;
+ state->ready = (GPLR(GPIO_PRDY) & GPIO_bit(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;
+
+ case 1:
+ /* on ConXS we only have one slot second is inactive */
+ 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:
+ printk(KERN_ERR "%s(): Vcc 5V not supported in socket\n", __FUNCTION__);
+ break;
+ default:
+ printk(KERN_ERR "%s(): bad Vcc %u\n", __FUNCTION__, state->Vcc);
+ ret = -1;
+ }
+
+ switch (state->Vpp) {
+ case 0: power &= 0xf3; break;
+ case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
+ case 120:
+ printk(KERN_ERR "%s(): Vpp 12V not supported in socket\n", __FUNCTION__);
+ break;
+ default:
+ if(state->Vpp != state->Vcc) {
+ printk(KERN_ERR "%s(): bad Vpp %u\n", __FUNCTION__, state->Vpp);
+ ret = -1;
+ }
+ }
+
+ switch (skt->nr) {
+ case 0: /* ony have one socket */
+ board_pcmcia_power(power);
+ break;
+
+ case 1: /* do nothing */
+ 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)
+{
+}
+
+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,
+ .nr = 2,
+ .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;
+
+ trizeps_pcmcia_device->dev.platform_data = &trizeps_pcmcia_ops;
+
+ ret = platform_device_add(trizeps_pcmcia_device);
+
+ if (ret)
+ platform_device_put(trizeps_pcmcia_device);
+
+ return ret;
+}
+
+static void __exit trizeps_pcmcia_exit(void)
+{
+ platform_device_unregister(trizeps_pcmcia_device);
+}
+
+fs_initcall(trizeps_pcmcia_init);
+module_exit(trizeps_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
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