summaryrefslogtreecommitdiff
path: root/target/linux/brcm63xx/patches-4.1/375-MIPS-BCM63XX-switch-to-new-gpio-driver.patch
blob: baf97b2f508dc4f0581217907ef142df75743d20 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
From cc99dca188bb63ba390008e2f7fa62d0300233e0 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Fri, 20 Feb 2015 23:58:54 +0100
Subject: [PATCH 2/6] MIPS: BCM63XX: switch to new gpio driver

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
 arch/mips/bcm63xx/boards/board_common.c |    2 +
 arch/mips/bcm63xx/gpio.c                |  147 +++++++------------------------
 arch/mips/bcm63xx/setup.c                |    3 -
 3 files changed, 33 insertions(+), 119 deletions(-)

--- a/arch/mips/bcm63xx/boards/board_common.c
+++ b/arch/mips/bcm63xx/boards/board_common.c
@@ -204,6 +204,8 @@ int __init board_register_devices(void)
 	}
 #endif
 
+	bcm63xx_gpio_init();
+
 	if (board.has_uart0)
 		bcm63xx_uart_register(0);
 
--- a/arch/mips/bcm63xx/gpio.c
+++ b/arch/mips/bcm63xx/gpio.c
@@ -5,147 +5,62 @@
  *
  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
  * Copyright (C) 2008-2011 Florian Fainelli <florian@openwrt.org>
+ * Copyright (C) Jonas Gorski <jogo@openwrt.org>
  */
 
 #include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
 #include <linux/platform_device.h>
+#include <linux/basic_mmio_gpio.h>
 #include <linux/gpio.h>
 
 #include <bcm63xx_cpu.h>
 #include <bcm63xx_gpio.h>
-#include <bcm63xx_io.h>
 #include <bcm63xx_regs.h>
 
-static u32 gpio_out_low_reg;
-
-static void bcm63xx_gpio_out_low_reg_init(void)
+static void __init bcm63xx_gpio_init_one(int id, int dir, int data, int ngpio)
 {
-	switch (bcm63xx_get_cpu_id()) {
-	case BCM6345_CPU_ID:
-		gpio_out_low_reg = GPIO_DATA_LO_REG_6345;
-		break;
-	default:
-		gpio_out_low_reg = GPIO_DATA_LO_REG;
-		break;
-	}
-}
-
-static DEFINE_SPINLOCK(bcm63xx_gpio_lock);
-static u32 gpio_out_low, gpio_out_high;
+	struct resource res[2];
+	struct bgpio_pdata pdata;
 
-static void bcm63xx_gpio_set(struct gpio_chip *chip,
-			     unsigned gpio, int val)
-{
-	u32 reg;
-	u32 mask;
-	u32 *v;
-	unsigned long flags;
-
-	if (gpio >= chip->ngpio)
-		BUG();
-
-	if (gpio < 32) {
-		reg = gpio_out_low_reg;
-		mask = 1 << gpio;
-		v = &gpio_out_low;
-	} else {
-		reg = GPIO_DATA_HI_REG;
-		mask = 1 << (gpio - 32);
-		v = &gpio_out_high;
-	}
-
-	spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
-	if (val)
-		*v |= mask;
-	else
-		*v &= ~mask;
-	bcm_gpio_writel(*v, reg);
-	spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
-}
+	memset(res, 0, sizeof(res));
+	memset(&pdata, 0, sizeof(pdata));
 
-static int bcm63xx_gpio_get(struct gpio_chip *chip, unsigned gpio)
-{
-	u32 reg;
-	u32 mask;
+	res[0].flags = IORESOURCE_MEM;
+	res[0].start = bcm63xx_regset_address(RSET_GPIO);
+	res[0].start += dir;
 
-	if (gpio >= chip->ngpio)
-		BUG();
+	res[0].end = res[0].start + 3;
 
-	if (gpio < 32) {
-		reg = gpio_out_low_reg;
-		mask = 1 << gpio;
-	} else {
-		reg = GPIO_DATA_HI_REG;
-		mask = 1 << (gpio - 32);
-	}
+	res[1].flags = IORESOURCE_MEM;
+	res[1].start = bcm63xx_regset_address(RSET_GPIO);
+	res[1].start += data;
 
-	return !!(bcm_gpio_readl(reg) & mask);
-}
+	res[1].end = res[1].start + 3;
 
-static int bcm63xx_gpio_set_direction(struct gpio_chip *chip,
-				      unsigned gpio, int dir)
-{
-	u32 reg;
-	u32 mask;
-	u32 tmp;
-	unsigned long flags;
-
-	if (gpio >= chip->ngpio)
-		BUG();
-
-	if (gpio < 32) {
-		reg = GPIO_CTL_LO_REG;
-		mask = 1 << gpio;
-	} else {
-		reg = GPIO_CTL_HI_REG;
-		mask = 1 << (gpio - 32);
-	}
-
-	spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
-	tmp = bcm_gpio_readl(reg);
-	if (dir == BCM63XX_GPIO_DIR_IN)
-		tmp &= ~mask;
-	else
-		tmp |= mask;
-	bcm_gpio_writel(tmp, reg);
-	spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
+	pdata.base = id * 32;
+	pdata.ngpio = ngpio;
 
-	return 0;
+	platform_device_register_resndata(NULL, "bcm63xx-gpio", id, res, 2,
+					  &pdata, sizeof(pdata));
 }
 
-static int bcm63xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+int __init bcm63xx_gpio_init(void)
 {
-	return bcm63xx_gpio_set_direction(chip, gpio, BCM63XX_GPIO_DIR_IN);
-}
+	int ngpio = bcm63xx_gpio_count();
+	int data_low_reg;
 
-static int bcm63xx_gpio_direction_output(struct gpio_chip *chip,
-					 unsigned gpio, int value)
-{
-	bcm63xx_gpio_set(chip, gpio, value);
-	return bcm63xx_gpio_set_direction(chip, gpio, BCM63XX_GPIO_DIR_OUT);
-}
+	if (BCMCPU_IS_6345())
+		data_low_reg = GPIO_DATA_LO_REG_6345;
+	else
+		data_low_reg = GPIO_DATA_LO_REG;
 
+	bcm63xx_gpio_init_one(0, GPIO_CTL_LO_REG, data_low_reg, min(ngpio, 32));
 
-static struct gpio_chip bcm63xx_gpio_chip = {
-	.label			= "bcm63xx-gpio",
-	.direction_input	= bcm63xx_gpio_direction_input,
-	.direction_output	= bcm63xx_gpio_direction_output,
-	.get			= bcm63xx_gpio_get,
-	.set			= bcm63xx_gpio_set,
-	.base			= 0,
-};
+	if (ngpio <= 32)
+		return 0;
 
-int __init bcm63xx_gpio_init(void)
-{
-	bcm63xx_gpio_out_low_reg_init();
+	bcm63xx_gpio_init_one(1, GPIO_CTL_HI_REG, GPIO_DATA_HI_REG, ngpio - 32);
 
-	gpio_out_low = bcm_gpio_readl(gpio_out_low_reg);
-	if (!BCMCPU_IS_6345())
-		gpio_out_high = bcm_gpio_readl(GPIO_DATA_HI_REG);
-	bcm63xx_gpio_chip.ngpio = bcm63xx_gpio_count();
-	pr_info("registering %d GPIOs\n", bcm63xx_gpio_chip.ngpio);
+	return 0;
 
-	return gpiochip_add(&bcm63xx_gpio_chip);
 }
--- a/arch/mips/bcm63xx/setup.c
+++ b/arch/mips/bcm63xx/setup.c
@@ -164,9 +164,6 @@ void __init plat_mem_setup(void)
 
 int __init bcm63xx_register_devices(void)
 {
-	/* register gpiochip */
-	bcm63xx_gpio_init();
-
 	return board_register_devices();
 }