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authorJohn Crispin <blogic@openwrt.org>2012-05-11 12:48:39 -0400
committerRalf Baechle <ralf@linux-mips.org>2012-05-21 09:31:52 -0400
commit5238f7bc356670ba702057c7de7f07909133f788 (patch)
tree44b2b896a3101e63a1d7497a60efc339e50b1dfa /arch/mips/lantiq/xway
parent57c8cb8f242988b8048a7058cd1edde025c6f232 (diff)
GPIO: MIPS: lantiq: move gpio-stp and gpio-ebu to the subsystem folder
Move the 2 drivers from arch/mips/lantiq/xway/ to the subsystem and make them buildable. The following 2 patches will convert the drivers to OF. Signed-off-by: John Crispin <blogic@openwrt.org> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Acked-by: Grant Likely <grant.likely@secretlab.ca> Patchwork: https://patchwork.linux-mips.org/patch/3838/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lantiq/xway')
-rw-r--r--arch/mips/lantiq/xway/Makefile2
-rw-r--r--arch/mips/lantiq/xway/gpio_ebu.c126
-rw-r--r--arch/mips/lantiq/xway/gpio_stp.c152
3 files changed, 1 insertions, 279 deletions
diff --git a/arch/mips/lantiq/xway/Makefile b/arch/mips/lantiq/xway/Makefile
index edef6c582fce..dc3194f6ee42 100644
--- a/arch/mips/lantiq/xway/Makefile
+++ b/arch/mips/lantiq/xway/Makefile
@@ -1 +1 @@
obj-y := prom.o sysctrl.o clk.o reset.o gpio.o gpio_stp.o gpio_ebu.o dma.o obj-y := prom.o sysctrl.o clk.o reset.o gpio.o dma.o
diff --git a/arch/mips/lantiq/xway/gpio_ebu.c b/arch/mips/lantiq/xway/gpio_ebu.c
deleted file mode 100644
index b91c7f17f10f..000000000000
--- a/arch/mips/lantiq/xway/gpio_ebu.c
+++ /dev/null
@@ -1,126 +0,0 @@
1/*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
5 *
6 * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
7 */
8
9#include <linux/init.h>
10#include <linux/export.h>
11#include <linux/types.h>
12#include <linux/platform_device.h>
13#include <linux/mutex.h>
14#include <linux/gpio.h>
15#include <linux/io.h>
16
17#include <lantiq_soc.h>
18
19/*
20 * By attaching hardware latches to the EBU it is possible to create output
21 * only gpios. This driver configures a special memory address, which when
22 * written to outputs 16 bit to the latches.
23 */
24
25#define LTQ_EBU_BUSCON 0x1e7ff /* 16 bit access, slowest timing */
26#define LTQ_EBU_WP 0x80000000 /* write protect bit */
27
28/* we keep a shadow value of the last value written to the ebu */
29static int ltq_ebu_gpio_shadow = 0x0;
30static void __iomem *ltq_ebu_gpio_membase;
31
32static void ltq_ebu_apply(void)
33{
34 unsigned long flags;
35
36 spin_lock_irqsave(&ebu_lock, flags);
37 ltq_ebu_w32(LTQ_EBU_BUSCON, LTQ_EBU_BUSCON1);
38 *((__u16 *)ltq_ebu_gpio_membase) = ltq_ebu_gpio_shadow;
39 ltq_ebu_w32(LTQ_EBU_BUSCON | LTQ_EBU_WP, LTQ_EBU_BUSCON1);
40 spin_unlock_irqrestore(&ebu_lock, flags);
41}
42
43static void ltq_ebu_set(struct gpio_chip *chip, unsigned offset, int value)
44{
45 if (value)
46 ltq_ebu_gpio_shadow |= (1 << offset);
47 else
48 ltq_ebu_gpio_shadow &= ~(1 << offset);
49 ltq_ebu_apply();
50}
51
52static int ltq_ebu_direction_output(struct gpio_chip *chip, unsigned offset,
53 int value)
54{
55 ltq_ebu_set(chip, offset, value);
56
57 return 0;
58}
59
60static struct gpio_chip ltq_ebu_chip = {
61 .label = "ltq_ebu",
62 .direction_output = ltq_ebu_direction_output,
63 .set = ltq_ebu_set,
64 .base = 72,
65 .ngpio = 16,
66 .can_sleep = 1,
67 .owner = THIS_MODULE,
68};
69
70static int ltq_ebu_probe(struct platform_device *pdev)
71{
72 int ret = 0;
73 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
74
75 if (!res) {
76 dev_err(&pdev->dev, "failed to get memory resource\n");
77 return -ENOENT;
78 }
79
80 res = devm_request_mem_region(&pdev->dev, res->start,
81 resource_size(res), dev_name(&pdev->dev));
82 if (!res) {
83 dev_err(&pdev->dev, "failed to request memory resource\n");
84 return -EBUSY;
85 }
86
87 ltq_ebu_gpio_membase = devm_ioremap_nocache(&pdev->dev, res->start,
88 resource_size(res));
89 if (!ltq_ebu_gpio_membase) {
90 dev_err(&pdev->dev, "Failed to ioremap mem region\n");
91 return -ENOMEM;
92 }
93
94 /* grab the default shadow value passed form the platform code */
95 ltq_ebu_gpio_shadow = (unsigned int) pdev->dev.platform_data;
96
97 /* tell the ebu controller which memory address we will be using */
98 ltq_ebu_w32(pdev->resource->start | 0x1, LTQ_EBU_ADDRSEL1);
99
100 /* write protect the region */
101 ltq_ebu_w32(LTQ_EBU_BUSCON | LTQ_EBU_WP, LTQ_EBU_BUSCON1);
102
103 ret = gpiochip_add(&ltq_ebu_chip);
104 if (!ret)
105 ltq_ebu_apply();
106 return ret;
107}
108
109static struct platform_driver ltq_ebu_driver = {
110 .probe = ltq_ebu_probe,
111 .driver = {
112 .name = "ltq_ebu",
113 .owner = THIS_MODULE,
114 },
115};
116
117static int __init ltq_ebu_init(void)
118{
119 int ret = platform_driver_register(&ltq_ebu_driver);
120
121 if (ret)
122 pr_info("ltq_ebu : Error registering platfom driver!");
123 return ret;
124}
125
126postcore_initcall(ltq_ebu_init);
diff --git a/arch/mips/lantiq/xway/gpio_stp.c b/arch/mips/lantiq/xway/gpio_stp.c
deleted file mode 100644
index d674f1be237d..000000000000
--- a/arch/mips/lantiq/xway/gpio_stp.c
+++ /dev/null
@@ -1,152 +0,0 @@
1/*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
5 *
6 * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
7 *
8 */
9
10#include <linux/slab.h>
11#include <linux/init.h>
12#include <linux/export.h>
13#include <linux/types.h>
14#include <linux/platform_device.h>
15#include <linux/mutex.h>
16#include <linux/io.h>
17#include <linux/gpio.h>
18
19#include <lantiq_soc.h>
20
21#define LTQ_STP_CON0 0x00
22#define LTQ_STP_CON1 0x04
23#define LTQ_STP_CPU0 0x08
24#define LTQ_STP_CPU1 0x0C
25#define LTQ_STP_AR 0x10
26
27#define LTQ_STP_CON_SWU (1 << 31)
28#define LTQ_STP_2HZ 0
29#define LTQ_STP_4HZ (1 << 23)
30#define LTQ_STP_8HZ (2 << 23)
31#define LTQ_STP_10HZ (3 << 23)
32#define LTQ_STP_SPEED_MASK (0xf << 23)
33#define LTQ_STP_UPD_FPI (1 << 31)
34#define LTQ_STP_UPD_MASK (3 << 30)
35#define LTQ_STP_ADSL_SRC (3 << 24)
36
37#define LTQ_STP_GROUP0 (1 << 0)
38
39#define LTQ_STP_RISING 0
40#define LTQ_STP_FALLING (1 << 26)
41#define LTQ_STP_EDGE_MASK (1 << 26)
42
43#define ltq_stp_r32(reg) __raw_readl(ltq_stp_membase + reg)
44#define ltq_stp_w32(val, reg) __raw_writel(val, ltq_stp_membase + reg)
45#define ltq_stp_w32_mask(clear, set, reg) \
46 ltq_w32((ltq_r32(ltq_stp_membase + reg) & ~(clear)) | (set), \
47 ltq_stp_membase + (reg))
48
49static int ltq_stp_shadow = 0xffff;
50static void __iomem *ltq_stp_membase;
51
52static void ltq_stp_set(struct gpio_chip *chip, unsigned offset, int value)
53{
54 if (value)
55 ltq_stp_shadow |= (1 << offset);
56 else
57 ltq_stp_shadow &= ~(1 << offset);
58 ltq_stp_w32(ltq_stp_shadow, LTQ_STP_CPU0);
59}
60
61static int ltq_stp_direction_output(struct gpio_chip *chip, unsigned offset,
62 int value)
63{
64 ltq_stp_set(chip, offset, value);
65
66 return 0;
67}
68
69static struct gpio_chip ltq_stp_chip = {
70 .label = "ltq_stp",
71 .direction_output = ltq_stp_direction_output,
72 .set = ltq_stp_set,
73 .base = 48,
74 .ngpio = 24,
75 .can_sleep = 1,
76 .owner = THIS_MODULE,
77};
78
79static int ltq_stp_hw_init(void)
80{
81 /* sane defaults */
82 ltq_stp_w32(0, LTQ_STP_AR);
83 ltq_stp_w32(0, LTQ_STP_CPU0);
84 ltq_stp_w32(0, LTQ_STP_CPU1);
85 ltq_stp_w32(LTQ_STP_CON_SWU, LTQ_STP_CON0);
86 ltq_stp_w32(0, LTQ_STP_CON1);
87
88 /* rising or falling edge */
89 ltq_stp_w32_mask(LTQ_STP_EDGE_MASK, LTQ_STP_FALLING, LTQ_STP_CON0);
90
91 /* per default stp 15-0 are set */
92 ltq_stp_w32_mask(0, LTQ_STP_GROUP0, LTQ_STP_CON1);
93
94 /* stp are update periodically by the FPI bus */
95 ltq_stp_w32_mask(LTQ_STP_UPD_MASK, LTQ_STP_UPD_FPI, LTQ_STP_CON1);
96
97 /* set stp update speed */
98 ltq_stp_w32_mask(LTQ_STP_SPEED_MASK, LTQ_STP_8HZ, LTQ_STP_CON1);
99
100 /* tell the hardware that pin (led) 0 and 1 are controlled
101 * by the dsl arc
102 */
103 ltq_stp_w32_mask(0, LTQ_STP_ADSL_SRC, LTQ_STP_CON0);
104
105 ltq_pmu_enable(PMU_LED);
106 return 0;
107}
108
109static int __devinit ltq_stp_probe(struct platform_device *pdev)
110{
111 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
112 int ret = 0;
113
114 if (!res)
115 return -ENOENT;
116 res = devm_request_mem_region(&pdev->dev, res->start,
117 resource_size(res), dev_name(&pdev->dev));
118 if (!res) {
119 dev_err(&pdev->dev, "failed to request STP memory\n");
120 return -EBUSY;
121 }
122 ltq_stp_membase = devm_ioremap_nocache(&pdev->dev, res->start,
123 resource_size(res));
124 if (!ltq_stp_membase) {
125 dev_err(&pdev->dev, "failed to remap STP memory\n");
126 return -ENOMEM;
127 }
128 ret = gpiochip_add(&ltq_stp_chip);
129 if (!ret)
130 ret = ltq_stp_hw_init();
131
132 return ret;
133}
134
135static struct platform_driver ltq_stp_driver = {
136 .probe = ltq_stp_probe,
137 .driver = {
138 .name = "ltq_stp",
139 .owner = THIS_MODULE,
140 },
141};
142
143int __init ltq_stp_init(void)
144{
145 int ret = platform_driver_register(&ltq_stp_driver);
146
147 if (ret)
148 pr_info("ltq_stp: error registering platfom driver");
149 return ret;
150}
151
152postcore_initcall(ltq_stp_init);
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