Root/target/linux/pxa/patches-3.3/005-verdex_pcmcia_support.patch

1From 76a102bd5c9d792db19c6c72eafdecea0311a0c9 Mon Sep 17 00:00:00 2001
2From: Craig Hughes <craig@gumstix.com>
3Date: Fri, 30 Oct 2009 14:16:27 -0400
4Subject: [PATCH] [ARM] pxa: Gumstix Verdex PCMCIA support
5
6Needed for the Libertas CS wireless device.
7
8Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
9---
10 drivers/pcmcia/Kconfig | 3 +-
11 drivers/pcmcia/Makefile | 3 +
12 drivers/pcmcia/pxa2xx_gumstix.c | 194 +++++++++++++++++++++++++++++++++++++++
13 3 files changed, 199 insertions(+), 1 deletions(-)
14 create mode 100644 drivers/pcmcia/pxa2xx_gumstix.c
15
16--- a/drivers/pcmcia/Kconfig
17+++ b/drivers/pcmcia/Kconfig
18@@ -212,7 +212,7 @@ config PCMCIA_PXA2XX
19             || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \
20             || ARCOM_PCMCIA || ARCH_PXA_ESERIES || MACH_STARGATE2 \
21             || MACH_VPAC270 || MACH_BALLOON3 || MACH_COLIBRI \
22- || MACH_COLIBRI320)
23+ || MACH_COLIBRI320 || ARCH_GUMSTIX)
24     select PCMCIA_SOC_COMMON
25     help
26       Say Y here to include support for the PXA2xx PCMCIA controller
27--- a/drivers/pcmcia/Makefile
28+++ b/drivers/pcmcia/Makefile
29@@ -70,6 +70,9 @@ pxa2xx-obj-$(CONFIG_MACH_BALLOON3) += p
30 pxa2xx-obj-$(CONFIG_MACH_COLIBRI) += pxa2xx_colibri.o
31 pxa2xx-obj-$(CONFIG_MACH_COLIBRI320) += pxa2xx_colibri.o
32 
33+pxa2xx-obj-$(CONFIG_MACH_GUMSTIX_VERDEX) += pxa2xx_cs.o
34+pxa2xx_cs-objs := pxa2xx_gumstix.o
35+
36 obj-$(CONFIG_PCMCIA_PXA2XX) += pxa2xx_base.o $(pxa2xx-obj-y)
37 
38 obj-$(CONFIG_PCMCIA_XXS1500) += xxs1500_ss.o
39--- /dev/null
40+++ b/drivers/pcmcia/pxa2xx_gumstix.c
41@@ -0,0 +1,195 @@
42+/*
43+ * linux/drivers/pcmcia/pxa2xx_gumstix.c
44+ *
45+ * Gumstix PCMCIA specific routines. Based on Mainstone
46+ *
47+ * Copyright 2004, Craig Hughes <craig@gumstix.com>
48+ *
49+ * This program is free software; you can redistribute it and/or modify
50+ * it under the terms of the GNU General Public License version 2 as
51+ * published by the Free Software Foundation.
52+ */
53+
54+#include <linux/module.h>
55+#include <linux/init.h>
56+#include <linux/kernel.h>
57+#include <linux/errno.h>
58+#include <linux/interrupt.h>
59+#include <linux/irq.h>
60+#include <linux/gpio.h>
61+
62+#include <linux/delay.h>
63+#include <linux/platform_device.h>
64+
65+#include <linux/gpio-pxa.h>
66+
67+#include <pcmcia/ss.h>
68+
69+#include <mach/hardware.h>
70+#include <asm/mach-types.h>
71+
72+#include <mach/pxa27x.h>
73+
74+#include <asm/io.h>
75+#include <mach/gpio.h>
76+#include <mach/gumstix.h>
77+#include "soc_common.h"
78+
79+#define ARRAY_AND_SIZE(x) (x), ARRAY_SIZE(x)
80+
81+#define BANK_OFF(n) (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))
82+#define GPLR(x) __REG2(0x40E00000, BANK_OFF((x) >> 5))
83+
84+static struct pcmcia_irqs gumstix_pcmcia_irqs0[] = {
85+ { 0, GUMSTIX_S0_nCD_IRQ, "CF0 nCD" },
86+ { 0, GUMSTIX_S0_nSTSCHG_IRQ, "CF0 nSTSCHG" },
87+};
88+
89+static struct pcmcia_irqs gumstix_pcmcia_irqs1[] = {
90+ { 1, GUMSTIX_S1_nCD_IRQ, "CF1 nCD" },
91+ { 1, GUMSTIX_S1_nSTSCHG_IRQ, "CF1 nSTSCHG" },
92+};
93+
94+
95+static int net_cf_vx_mode = 0;
96+
97+static int gumstix_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
98+{
99+/* Note: The verdex_pcmcia_pin_config is moved to gumstix_verdex.c in order to use mfp_pxa2xx_config
100+ for board-specific pin configuration instead of the old deprecated pxa_gpio_mode function. Thus,
101+ only the IRQ init is still needed to be done here. */
102+ skt->socket.pci_irq = (skt->nr == 0) ? ((net_cf_vx_mode == 0) ? GUMSTIX_S0_PRDY_nBSY_IRQ : GUMSTIX_S0_PRDY_nBSY_OLD_IRQ) : GUMSTIX_S1_PRDY_nBSY_IRQ;
103+
104+ return (skt->nr == 0) ? soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)) :
105+ soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
106+}
107+
108+static void gumstix_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
109+{
110+ if(skt->nr == 0)
111+ {
112+ soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
113+ } else {
114+ soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
115+ }
116+
117+ if (net_cf_vx_mode) {
118+ gpio_free(GPIO_GUMSTIX_CF_OLD_RESET);
119+ } else {
120+ gpio_free(GPIO_GUMSTIX_CF_RESET);
121+ }
122+
123+}
124+
125+static void gumstix_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
126+ struct pcmcia_state *state)
127+{
128+ unsigned int cd, prdy_nbsy, nbvd1;
129+ if(skt->nr == 0)
130+ {
131+ cd = GPIO_GUMSTIX_nCD_0;
132+ if(net_cf_vx_mode)
133+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0_OLD;
134+ else
135+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0;
136+ nbvd1 = GPIO_GUMSTIX_nBVD1_0;
137+ } else {
138+ cd = GPIO_GUMSTIX_nCD_1;
139+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_1;
140+ nbvd1 = GPIO_GUMSTIX_nBVD1_1;
141+ }
142+ state->detect = !!gpio_get_value(cd);
143+ state->ready = !!gpio_get_value(prdy_nbsy);
144+ state->bvd1 = !!gpio_get_value(nbvd1);
145+ state->bvd2 = 1;
146+ state->vs_3v = 0;
147+ state->vs_Xv = 0;
148+ state->wrprot = 0;
149+}
150+
151+static int gumstix_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
152+ const socket_state_t *state)
153+{
154+ return 0;
155+}
156+
157+static void gumstix_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
158+{
159+ if(skt->nr) {
160+ soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
161+ } else {
162+ soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
163+ }
164+}
165+
166+static void gumstix_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
167+{
168+ if(skt->nr) {
169+ soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
170+ } else {
171+ soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
172+ }
173+}
174+
175+static struct pcmcia_low_level gumstix_pcmcia_ops = {
176+ .owner = THIS_MODULE,
177+ .hw_init = gumstix_pcmcia_hw_init,
178+ .hw_shutdown = gumstix_pcmcia_hw_shutdown,
179+ .socket_state = gumstix_pcmcia_socket_state,
180+ .configure_socket = gumstix_pcmcia_configure_socket,
181+ .socket_init = gumstix_pcmcia_socket_init,
182+ .socket_suspend = gumstix_pcmcia_socket_suspend,
183+ .nr = 2,
184+};
185+
186+static struct platform_device *gumstix_pcmcia_device;
187+
188+extern int __init gumstix_get_cf_cards(void);
189+
190+#ifdef CONFIG_MACH_GUMSTIX_VERDEX
191+extern int __init gumstix_check_if_netCF_vx(void);
192+#endif
193+
194+static int __init gumstix_pcmcia_init(void)
195+{
196+ int ret;
197+
198+#ifdef CONFIG_MACH_GUMSTIX_VERDEX
199+ net_cf_vx_mode = gumstix_check_if_netCF_vx();
200+#endif
201+
202+ gumstix_pcmcia_ops.nr = gumstix_get_cf_cards();
203+
204+ gumstix_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
205+ if (!gumstix_pcmcia_device)
206+ return -ENOMEM;
207+
208+ ret = platform_device_add_data(gumstix_pcmcia_device, &gumstix_pcmcia_ops,
209+ sizeof(gumstix_pcmcia_ops));
210+
211+ if (ret == 0) {
212+ printk(KERN_INFO "Registering gumstix PCMCIA interface.\n");
213+ ret = platform_device_add(gumstix_pcmcia_device);
214+ }
215+
216+ if (ret)
217+ platform_device_put(gumstix_pcmcia_device);
218+
219+ return ret;
220+}
221+
222+static void __exit gumstix_pcmcia_exit(void)
223+{
224+ /*
225+ * This call is supposed to free our gumstix_pcmcia_device.
226+ * Unfortunately platform_device don't have a free method, and
227+ * we can't assume it's free of any reference at this point so we
228+ * can't free it either.
229+ */
230+ platform_device_unregister(gumstix_pcmcia_device);
231+}
232+
233+fs_initcall(gumstix_pcmcia_init);
234+module_exit(gumstix_pcmcia_exit);
235+
236+MODULE_LICENSE("GPL");
237

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