Root/target/linux/ifxmips/patches-2.6.30/600-ebu-gpio.patch

1Index: linux-2.6.30.10/drivers/gpio/Kconfig
2===================================================================
3--- linux-2.6.30.10.orig/drivers/gpio/Kconfig 2010-03-24 21:55:56.000000000 +0100
4+++ linux-2.6.30.10/drivers/gpio/Kconfig 2010-03-24 21:56:36.000000000 +0100
5@@ -176,4 +176,12 @@
6       SPI driver for Microchip MCP23S08 I/O expander. This provides
7       a GPIO interface supporting inputs and outputs.
8 
9+comment "EBU GPIO expanders:"
10+
11+config GPIO_IFXMIPS_EBU
12+ boolean "IFXMIPS EBU attached I/O expander"
13+ depends on IFXMIPS
14+ help
15+ This driver allows you to drive latches attached to the SoCc External Bus Unit
16+
17 endif
18Index: linux-2.6.30.10/drivers/gpio/Makefile
19===================================================================
20--- linux-2.6.30.10.orig/drivers/gpio/Makefile 2010-03-24 21:55:56.000000000 +0100
21+++ linux-2.6.30.10/drivers/gpio/Makefile 2010-03-24 21:56:36.000000000 +0100
22@@ -12,3 +12,4 @@
23 obj-$(CONFIG_GPIO_TWL4030) += twl4030-gpio.o
24 obj-$(CONFIG_GPIO_XILINX) += xilinx_gpio.o
25 obj-$(CONFIG_GPIO_BT8XX) += bt8xxgpio.o
26+obj-$(CONFIG_GPIO_IFXMIPS_EBU) += ifxmips_ebu_gpio.o
27Index: linux-2.6.30.10/arch/mips/ifxmips/board.c
28===================================================================
29--- linux-2.6.30.10.orig/arch/mips/ifxmips/board.c 2010-03-25 10:43:06.000000000 +0100
30+++ linux-2.6.30.10/arch/mips/ifxmips/board.c 2010-03-25 12:40:54.000000000 +0100
31@@ -111,6 +111,11 @@
32     .name = "ifxmips_wdt",
33 };
34 
35+static struct platform_device ifxmips_ebu = {
36+ .id = 0,
37+ .name = "ifxmips_ebu",
38+};
39+
40 static struct resource ifxmips_mtd_resource = {
41     .start = IFXMIPS_FLASH_START,
42     .end = IFXMIPS_FLASH_START + IFXMIPS_FLASH_MAX - 1,
43@@ -145,10 +150,18 @@
44 static struct gpio_led arv452_gpio_leds[] = {
45     { .name = "ifx:blue:power", .gpio = 3, .active_low = 1, },
46     { .name = "ifx:blue:adsl", .gpio = 4, .active_low = 1, },
47- { .name = "ifx:pink:internet", .gpio = 5, .active_low = 1, },
48+ { .name = "ifx:blue:internet", .gpio = 5, .active_low = 1, },
49     { .name = "ifx:red:power", .gpio = 6, .active_low = 1, },
50     { .name = "ifx:yello:wps", .gpio = 7, .active_low = 1, },
51     { .name = "ifx:red:wps", .gpio = 9, .active_low = 1, },
52+ { .name = "ifx:blue:voip", .gpio = 32, .active_low = 1, },
53+ { .name = "ifx:blue:fxs1", .gpio = 33, .active_low = 1, },
54+ { .name = "ifx:blue:fxs2", .gpio = 34, .active_low = 1, },
55+ { .name = "ifx:blue:fxo", .gpio = 35, .active_low = 1, },
56+ { .name = "ifx:blue:voice", .gpio = 36, .active_low = 1, },
57+ { .name = "ifx:blue:usb", .gpio = 37, .active_low = 1, },
58+ { .name = "ifx:blue:wlan", .gpio = 38, .active_low = 1, },
59+ { .name = "ifx:red:internet", .gpio = 41, .active_low = 1, },
60 };
61 
62 static struct gpio_led_platform_data ifxmips_gpio_led_data;
63@@ -205,6 +218,7 @@
64 struct platform_device *arv452_devs[] = {
65     &ifxmips_gpio, &ifxmips_mii, &ifxmips_mtd,
66     &ifxmips_gpio_dev, &ifxmips_wdt, &dwc_usb,
67+ &ifxmips_ebu,
68 #ifdef CONFIG_LEDS_GPIO
69     &ifxmips_gpio_leds,
70 #endif
71Index: linux-2.6.30.10/drivers/gpio/ifxmips_ebu_gpio.c
72===================================================================
73--- /dev/null 1970-01-01 00:00:00.000000000 +0000
74+++ linux-2.6.30.10/drivers/gpio/ifxmips_ebu_gpio.c 2010-03-25 12:47:07.000000000 +0100
75@@ -0,0 +1,121 @@
76+/*
77+ * This program is free software; you can redistribute it and/or modify
78+ * it under the terms of the GNU General Public License as published by
79+ * the Free Software Foundation; either version 2 of the License, or
80+ * (at your option) any later version.
81+ *
82+ * This program is distributed in the hope that it will be useful,
83+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
84+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
85+ * GNU General Public License for more details.
86+ *
87+ * You should have received a copy of the GNU General Public License
88+ * along with this program; if not, write to the Free Software
89+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
90+ *
91+ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
92+ */
93+
94+#include <linux/init.h>
95+#include <linux/platform_device.h>
96+#include <linux/mutex.h>
97+#include <linux/gpio.h>
98+#include <ifxmips.h>
99+
100+#define IFXMIPS_EBU_START 0x14000000
101+#define IFXMIPS_EBU_MAX 0x00001000
102+#define IFXMIPS_EBU_BUSCON 0x1e7ff
103+#define IFXMIPS_EBU_WP 0x80000000
104+
105+static int shadow = (1 << 10) | (1 << 8);
106+static void __iomem *virt;
107+
108+static int
109+ifxmips_ebu_direction_input(struct gpio_chip *chip, unsigned offset)
110+{
111+ return -EINVAL;
112+}
113+
114+static int
115+ifxmips_ebu_direction_output(struct gpio_chip *chip, unsigned offset, int value)
116+{
117+ return 0;
118+}
119+
120+static int
121+ifxmips_ebu_get(struct gpio_chip *chip, unsigned offset)
122+{
123+ return -EINVAL;
124+}
125+
126+static void
127+ifxmips_ebu_set(struct gpio_chip *chip, unsigned offset, int value)
128+{
129+ if(value)
130+ shadow |= (1 << offset);
131+ else
132+ shadow &= ~(1 << offset);
133+ ifxmips_w32(IFXMIPS_EBU_BUSCON, IFXMIPS_EBU_BUSCON1);
134+ *((__u16*)virt) = shadow;
135+ ifxmips_w32(IFXMIPS_EBU_BUSCON | IFXMIPS_EBU_WP, IFXMIPS_EBU_BUSCON1);
136+}
137+
138+static struct gpio_chip
139+ifxmips_ebu_chip =
140+{
141+ .label = "ifxmips_ebu",
142+ .direction_input = ifxmips_ebu_direction_input,
143+ .direction_output = ifxmips_ebu_direction_output,
144+ .set = ifxmips_ebu_set,
145+ .get = ifxmips_ebu_get,
146+ .base = 32,
147+ .ngpio = 16,
148+ .can_sleep = 1,
149+ .owner = THIS_MODULE,
150+};
151+
152+static int __devinit
153+ifxmips_ebu_probe(struct platform_device *dev)
154+{
155+ ifxmips_w32(IFXMIPS_EBU_START | 0x1, IFXMIPS_EBU_ADDRSEL1);
156+ ifxmips_w32(IFXMIPS_EBU_BUSCON | IFXMIPS_EBU_WP, IFXMIPS_EBU_BUSCON1);
157+ virt = ioremap_nocache(IFXMIPS_EBU_START, IFXMIPS_EBU_MAX);
158+ if(gpiochip_add(&ifxmips_ebu_chip))
159+ return -EINVAL;
160+ return 0;
161+}
162+
163+static int
164+ifxmips_ebu_remove(struct platform_device *dev)
165+{
166+ return gpiochip_remove(&ifxmips_ebu_chip);
167+}
168+
169+static struct platform_driver
170+ifxmips_ebu_driver = {
171+ .probe = ifxmips_ebu_probe,
172+ .remove = ifxmips_ebu_remove,
173+ .driver = {
174+ .name = "ifxmips_ebu",
175+ .owner = THIS_MODULE,
176+ },
177+};
178+
179+static int __init
180+ifxmips_ebu_init(void)
181+{
182+ return platform_driver_register(&ifxmips_ebu_driver);
183+}
184+
185+static void __exit
186+ifxmips_ebu_exit(void)
187+{
188+ platform_driver_unregister(&ifxmips_ebu_driver);
189+}
190+
191+module_init(ifxmips_ebu_init);
192+module_exit(ifxmips_ebu_exit);
193+
194+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
195+MODULE_LICENSE("GPL v2");
196+MODULE_DESCRIPTION("ifxmips - EBU Latch GPIO-Expander");
197

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