--- /dev/null
+/*
+ * linux/drivers/pcmcia/pxa2xx_lubbock.c
+ *
+ * Author: George Davis
+ * Created: Jan 10, 2002
+ * Copyright: 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.
+ *
+ * Originally based upon linux/drivers/pcmcia/sa1100_neponset.c
+ *
+ * Lubbock PCMCIA specific routines.
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <mach/hardware.h>
+#include <asm/hardware/sa1111.h>
+#include <asm/mach-types.h>
+#include <mach/lubbock.h>
+
+#include "sa1111_generic.h"
+
+static int
+lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ struct sa1111_pcmcia_socket *s = to_skt(skt);
+ unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
+ int ret = 0;
+
+ pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0;
+
+ /* Lubbock uses the Maxim MAX1602, with the following connections:
+ *
+ * Socket 0 (PCMCIA):
+ * MAX1602 Lubbock Register
+ * Pin Signal
+ * ----- ------- ----------------------
+ * A0VPP S0_PWR0 SA-1111 GPIO A<0>
+ * A1VPP S0_PWR1 SA-1111 GPIO A<1>
+ * A0VCC S0_PWR2 SA-1111 GPIO A<2>
+ * A1VCC S0_PWR3 SA-1111 GPIO A<3>
+ * VX VCC
+ * VY +3.3V
+ * 12IN +12V
+ * CODE +3.3V Cirrus Code, CODE = High (VY)
+ *
+ * Socket 1 (CF):
+ * MAX1602 Lubbock Register
+ * Pin Signal
+ * ----- ------- ----------------------
+ * A0VPP GND VPP is not connected
+ * A1VPP GND VPP is not connected
+ * A0VCC S1_PWR0 MISC_WR<14>
+ * A1VCC S1_PWR1 MISC_WR<15>
+ * VX VCC
+ * VY +3.3V
+ * 12IN GND VPP is not connected
+ * CODE +3.3V Cirrus Code, CODE = High (VY)
+ *
+ */
+
+ again:
+ switch (skt->nr) {
+ case 0:
+ pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
+
+ switch (state->Vcc) {
+ case 0: /* Hi-Z */
+ break;
+
+ case 33: /* VY */
+ pa_dwr_set |= GPIO_A3;
+ break;
+
+ case 50: /* VX */
+ pa_dwr_set |= GPIO_A2;
+ break;
+
+ default:
+ printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
+ __func__, state->Vcc);
+ ret = -1;
+ }
+
+ switch (state->Vpp) {
+ case 0: /* Hi-Z */
+ break;
+
+ case 120: /* 12IN */
+ pa_dwr_set |= GPIO_A1;
+ break;
+
+ default: /* VCC */
+ if (state->Vpp == state->Vcc)
+ pa_dwr_set |= GPIO_A0;
+ else {
+ printk(KERN_ERR "%s(): unrecognized Vpp %u\n",
+ __func__, state->Vpp);
+ ret = -1;
+ break;
+ }
+ }
+ break;
+
+ case 1:
+ misc_mask = (1 << 15) | (1 << 14);
+
+ switch (state->Vcc) {
+ case 0: /* Hi-Z */
+ break;
+
+ case 33: /* VY */
+ misc_set |= 1 << 15;
+ break;
+
+ case 50: /* VX */
+ misc_set |= 1 << 14;
+ break;
+
+ default:
+ printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
+ __func__, state->Vcc);
+ ret = -1;
+ break;
+ }
+
+ if (state->Vpp != state->Vcc && state->Vpp != 0) {
+ printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
+ __func__, state->Vpp);
+ ret = -1;
+ break;
+ }
+ break;
+
+ default:
+ ret = -1;
+ }
+
+ if (ret == 0)
+ ret = sa1111_pcmcia_configure_socket(skt, state);
+
+ if (ret == 0) {
+ lubbock_set_misc_wr(misc_mask, misc_set);
+ sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
+ }
+
+#if 1
+ if (ret == 0 && state->Vcc == 33) {
+ struct pcmcia_state new_state;
+
+ /*
+ * HACK ALERT:
+ * We can't sense the voltage properly on Lubbock before
+ * actually applying some power to the socket (catch 22).
+ * Resense the socket Voltage Sense pins after applying
+ * socket power.
+ *
+ * Note: It takes about 2.5ms for the MAX1602 VCC output
+ * to rise.
+ */
+ mdelay(3);
+
+ sa1111_pcmcia_socket_state(skt, &new_state);
+
+ if (!new_state.vs_3v && !new_state.vs_Xv) {
+ /*
+ * Switch to 5V, Configure socket with 5V voltage
+ */
+ lubbock_set_misc_wr(misc_mask, 0);
+ sa1111_set_io(s->dev, pa_dwr_mask, 0);
+
+ /*
+ * It takes about 100ms to turn off Vcc.
+ */
+ mdelay(100);
+
+ /*
+ * We need to hack around the const qualifier as
+ * well to keep this ugly workaround localized and
+ * not force it to the rest of the code. Barf bags
+ * available in the seat pocket in front of you!
+ */
+ ((socket_state_t *)state)->Vcc = 50;
+ ((socket_state_t *)state)->Vpp = 50;
+ goto again;
+ }
+ }
+#endif
+
+ return ret;
+}
+
+static struct pcmcia_low_level lubbock_pcmcia_ops = {
+ .owner = THIS_MODULE,
+ .configure_socket = lubbock_pcmcia_configure_socket,
+ .first = 0,
+ .nr = 2,
+};
+
+#include "pxa2xx_base.h"
+
+int pcmcia_lubbock_init(struct sa1111_dev *sadev)
+{
+ int ret = -ENODEV;
+
+ if (machine_is_lubbock()) {
+ /*
+ * Set GPIO_A<3:0> to be outputs for the MAX1600,
+ * and switch to standby mode.
+ */
+ sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
+ sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
+ sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
+
+ /* Set CF Socket 1 power to standby mode. */
+ lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
+
+ pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
+ pxa2xx_configure_sockets(&sadev->dev);
+ ret = sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
+ pxa2xx_drv_pcmcia_add_one);
+ }
+
+ return ret;
+}
+
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff