Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / pcmcia / pxa2xx_mainstone.c

diff --git a/kernel/drivers/pcmcia/pxa2xx_mainstone.c b/kernel/drivers/pcmcia/pxa2xx_mainstone.c
new file mode 100644 (file)
index 0000000..7e32e25
--- /dev/null
+++ b/kernel/drivers/pcmcia/pxa2xx_mainstone.c
@@ -0,0 +1,170 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_mainstone.c
+ *
+ * Mainstone PCMCIA specific routines.
+ *
+ * Created:    May 12, 2004
+ * Author:     Nicolas Pitre
+ * 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.
+ */
+
+#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/mach-types.h>
+#include <asm/irq.h>
+
+#include <mach/pxa2xx-regs.h>
+#include <mach/mainstone.h>
+
+#include "soc_common.h"
+
+
+static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+       /*
+        * Setup default state of GPIO outputs
+        * before we enable them as outputs.
+        */
+       if (skt->nr == 0) {
+               skt->socket.pci_irq = MAINSTONE_S0_IRQ;
+               skt->stat[SOC_STAT_CD].irq = MAINSTONE_S0_CD_IRQ;
+               skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
+               skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S0_STSCHG_IRQ;
+               skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG";
+       } else {
+               skt->socket.pci_irq = MAINSTONE_S1_IRQ;
+               skt->stat[SOC_STAT_CD].irq = MAINSTONE_S1_CD_IRQ;
+               skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
+               skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S1_STSCHG_IRQ;
+               skt->stat[SOC_STAT_BVD1].name = "PCMCIA1 STSCHG";
+       }
+       return 0;
+}
+
+static unsigned long mst_pcmcia_status[2];
+
+static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+                                   struct pcmcia_state *state)
+{
+       unsigned long status, flip;
+
+       status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
+       flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
+
+       /*
+        * Workaround for STSCHG which can't be deasserted:
+        * We therefore disable/enable corresponding IRQs
+        * as needed to avoid IRQ locks.
+        */
+       if (flip) {
+               mst_pcmcia_status[skt->nr] = status;
+               if (status & MST_PCMCIA_nSTSCHG_BVD1)
+                       enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
+                                                  : MAINSTONE_S1_STSCHG_IRQ );
+               else
+                       disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
+                                                   : MAINSTONE_S1_STSCHG_IRQ );
+       }
+
+       state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
+       state->ready  = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
+       state->bvd1   = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
+       state->bvd2   = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
+       state->vs_3v  = (status & MST_PCMCIA_nVS1) ? 0 : 1;
+       state->vs_Xv  = (status & MST_PCMCIA_nVS2) ? 0 : 1;
+}
+
+static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+                                      const socket_state_t *state)
+{
+       unsigned long power = 0;
+       int ret = 0;
+
+       switch (state->Vcc) {
+       case 0:  power |= MST_PCMCIA_PWR_VCC_0;  break;
+       case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
+       case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
+       default:
+                printk(KERN_ERR "%s(): bad Vcc %u\n",
+                                __func__, state->Vcc);
+                ret = -1;
+       }
+
+       switch (state->Vpp) {
+       case 0:   power |= MST_PCMCIA_PWR_VPP_0;   break;
+       case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
+       default:
+                 if(state->Vpp == state->Vcc) {
+                         power |= MST_PCMCIA_PWR_VPP_VCC;
+                 } else {
+                         printk(KERN_ERR "%s(): bad Vpp %u\n",
+                                         __func__, state->Vpp);
+                         ret = -1;
+                 }
+       }
+
+       if (state->flags & SS_RESET)
+              power |= MST_PCMCIA_RESET;
+
+       switch (skt->nr) {
+       case 0:  MST_PCMCIA0 = power; break;
+       case 1:  MST_PCMCIA1 = power; break;
+       default: ret = -1;
+       }
+
+       return ret;
+}
+
+static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
+       .owner                  = THIS_MODULE,
+       .hw_init                = mst_pcmcia_hw_init,
+       .socket_state           = mst_pcmcia_socket_state,
+       .configure_socket       = mst_pcmcia_configure_socket,
+       .nr                     = 2,
+};
+
+static struct platform_device *mst_pcmcia_device;
+
+static int __init mst_pcmcia_init(void)
+{
+       int ret;
+
+       if (!machine_is_mainstone())
+               return -ENODEV;
+
+       mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+       if (!mst_pcmcia_device)
+               return -ENOMEM;
+
+       ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
+                                      sizeof(mst_pcmcia_ops));
+       if (ret == 0)
+               ret = platform_device_add(mst_pcmcia_device);
+
+       if (ret)
+               platform_device_put(mst_pcmcia_device);
+
+       return ret;
+}
+
+static void __exit mst_pcmcia_exit(void)
+{
+       platform_device_unregister(mst_pcmcia_device);
+}
+
+fs_initcall(mst_pcmcia_init);
+module_exit(mst_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");