Commit | Line | Data |
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19cfd5c0 LB |
1 | /* |
2 | * arch/arm/mach-orion5x/mpp.c | |
3 | * | |
4 | * MPP functions for Marvell Orion 5x SoCs | |
5 | * | |
6 | * This file is licensed under the terms of the GNU General Public | |
7 | * License version 2. This program is licensed "as is" without any | |
8 | * warranty of any kind, whether express or implied. | |
9 | */ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/mbus.h> | |
fced80c7 | 14 | #include <linux/io.h> |
9569dae7 | 15 | #include <asm/gpio.h> |
a09e64fb | 16 | #include <mach/hardware.h> |
19cfd5c0 LB |
17 | #include "common.h" |
18 | #include "mpp.h" | |
19 | ||
20 | static int is_5181l(void) | |
21 | { | |
22 | u32 dev; | |
23 | u32 rev; | |
24 | ||
25 | orion5x_pcie_id(&dev, &rev); | |
26 | ||
27 | return !!(dev == MV88F5181_DEV_ID && rev >= MV88F5181L_REV_A0); | |
28 | } | |
29 | ||
30 | static int is_5182(void) | |
31 | { | |
32 | u32 dev; | |
33 | u32 rev; | |
34 | ||
35 | orion5x_pcie_id(&dev, &rev); | |
36 | ||
37 | return !!(dev == MV88F5182_DEV_ID); | |
38 | } | |
39 | ||
40 | static int is_5281(void) | |
41 | { | |
42 | u32 dev; | |
43 | u32 rev; | |
44 | ||
45 | orion5x_pcie_id(&dev, &rev); | |
46 | ||
47 | return !!(dev == MV88F5281_DEV_ID); | |
48 | } | |
49 | ||
50 | static int __init determine_type_encoding(int mpp, enum orion5x_mpp_type type) | |
51 | { | |
52 | switch (type) { | |
53 | case MPP_UNUSED: | |
54 | case MPP_GPIO: | |
55 | if (mpp == 0) | |
56 | return 3; | |
57 | if (mpp >= 1 && mpp <= 15) | |
58 | return 0; | |
59 | if (mpp >= 16 && mpp <= 19) { | |
60 | if (is_5182()) | |
61 | return 5; | |
62 | if (type == MPP_UNUSED) | |
63 | return 0; | |
64 | } | |
65 | return -1; | |
66 | ||
67 | case MPP_PCIE_RST_OUTn: | |
68 | if (mpp == 0) | |
69 | return 0; | |
70 | return -1; | |
71 | ||
72 | case MPP_PCI_ARB: | |
73 | if (mpp >= 0 && mpp <= 7) | |
74 | return 2; | |
75 | return -1; | |
76 | ||
77 | case MPP_PCI_PMEn: | |
78 | if (mpp == 2) | |
79 | return 3; | |
80 | return -1; | |
81 | ||
82 | case MPP_GIGE: | |
83 | if (mpp >= 8 && mpp <= 19) | |
84 | return 1; | |
85 | return -1; | |
86 | ||
87 | case MPP_NAND: | |
88 | if (is_5182() || is_5281()) { | |
89 | if (mpp >= 4 && mpp <= 7) | |
90 | return 4; | |
91 | if (mpp >= 12 && mpp <= 17) | |
92 | return 4; | |
93 | } | |
94 | return -1; | |
95 | ||
96 | case MPP_PCI_CLK: | |
97 | if (is_5181l() && mpp >= 6 && mpp <= 7) | |
98 | return 5; | |
99 | return -1; | |
100 | ||
101 | case MPP_SATA_LED: | |
102 | if (is_5182()) { | |
103 | if (mpp >= 4 && mpp <= 7) | |
104 | return 5; | |
105 | if (mpp >= 12 && mpp <= 15) | |
106 | return 5; | |
107 | } | |
108 | return -1; | |
109 | ||
110 | case MPP_UART: | |
111 | if (mpp >= 16 && mpp <= 19) | |
112 | return 0; | |
113 | return -1; | |
114 | } | |
115 | ||
116 | printk(KERN_INFO "unknown MPP type %d\n", type); | |
117 | ||
118 | return -1; | |
119 | } | |
120 | ||
121 | void __init orion5x_mpp_conf(struct orion5x_mpp_mode *mode) | |
122 | { | |
123 | u32 mpp_0_7_ctrl = readl(MPP_0_7_CTRL); | |
124 | u32 mpp_8_15_ctrl = readl(MPP_8_15_CTRL); | |
125 | u32 mpp_16_19_ctrl = readl(MPP_16_19_CTRL); | |
126 | ||
a8865655 EB |
127 | /* Initialize gpiolib. */ |
128 | orion_gpio_init(); | |
129 | ||
19cfd5c0 LB |
130 | while (mode->mpp >= 0) { |
131 | u32 *reg; | |
132 | int num_type; | |
133 | int shift; | |
134 | ||
135 | if (mode->mpp >= 0 && mode->mpp <= 7) | |
136 | reg = &mpp_0_7_ctrl; | |
137 | else if (mode->mpp >= 8 && mode->mpp <= 15) | |
138 | reg = &mpp_8_15_ctrl; | |
139 | else if (mode->mpp >= 16 && mode->mpp <= 19) | |
140 | reg = &mpp_16_19_ctrl; | |
141 | else { | |
142 | printk(KERN_ERR "orion5x_mpp_conf: invalid MPP " | |
143 | "(%d)\n", mode->mpp); | |
144 | continue; | |
145 | } | |
146 | ||
147 | num_type = determine_type_encoding(mode->mpp, mode->type); | |
148 | if (num_type < 0) { | |
149 | printk(KERN_ERR "orion5x_mpp_conf: invalid MPP " | |
150 | "combination (%d, %d)\n", mode->mpp, | |
151 | mode->type); | |
152 | continue; | |
153 | } | |
154 | ||
155 | shift = (mode->mpp & 7) << 2; | |
156 | *reg &= ~(0xf << shift); | |
157 | *reg |= (num_type & 0xf) << shift; | |
158 | ||
9569dae7 LB |
159 | if (mode->type == MPP_UNUSED && (mode->mpp < 16 || is_5182())) |
160 | orion_gpio_set_unused(mode->mpp); | |
161 | ||
162 | orion_gpio_set_valid(mode->mpp, !!(mode->type == MPP_GPIO)); | |
19cfd5c0 LB |
163 | |
164 | mode++; | |
165 | } | |
166 | ||
167 | writel(mpp_0_7_ctrl, MPP_0_7_CTRL); | |
168 | writel(mpp_8_15_ctrl, MPP_8_15_CTRL); | |
169 | writel(mpp_16_19_ctrl, MPP_16_19_CTRL); | |
170 | } |