2 * arch/arm/mach-orion5x/mpp.c
4 * MPP functions for Marvell Orion 5x SoCs
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.
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/mbus.h>
16 #include <mach/hardware.h>
20 static int is_5181l(void)
25 orion5x_pcie_id(&dev, &rev);
27 return !!(dev == MV88F5181_DEV_ID && rev >= MV88F5181L_REV_A0);
30 static int is_5182(void)
35 orion5x_pcie_id(&dev, &rev);
37 return !!(dev == MV88F5182_DEV_ID);
40 static int is_5281(void)
45 orion5x_pcie_id(&dev, &rev);
47 return !!(dev == MV88F5281_DEV_ID);
50 static int __init determine_type_encoding(int mpp, enum orion5x_mpp_type type)
57 if (mpp >= 1 && mpp <= 15)
59 if (mpp >= 16 && mpp <= 19) {
62 if (type == MPP_UNUSED)
67 case MPP_PCIE_RST_OUTn:
73 if (mpp >= 0 && mpp <= 7)
83 if (mpp >= 8 && mpp <= 19)
88 if (is_5182() || is_5281()) {
89 if (mpp >= 4 && mpp <= 7)
91 if (mpp >= 12 && mpp <= 17)
97 if (is_5181l() && mpp >= 6 && mpp <= 7)
103 if (mpp >= 4 && mpp <= 7)
105 if (mpp >= 12 && mpp <= 15)
111 if (mpp >= 16 && mpp <= 19)
116 printk(KERN_INFO "unknown MPP type %d\n", type);
121 void __init orion5x_mpp_conf(struct orion5x_mpp_mode *mode)
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);
127 /* Initialize gpiolib. */
130 while (mode->mpp >= 0) {
135 if (mode->mpp >= 0 && mode->mpp <= 7)
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;
142 printk(KERN_ERR "orion5x_mpp_conf: invalid MPP "
143 "(%d)\n", mode->mpp);
147 num_type = determine_type_encoding(mode->mpp, mode->type);
149 printk(KERN_ERR "orion5x_mpp_conf: invalid MPP "
150 "combination (%d, %d)\n", mode->mpp,
155 shift = (mode->mpp & 7) << 2;
156 *reg &= ~(0xf << shift);
157 *reg |= (num_type & 0xf) << shift;
159 if (mode->type == MPP_UNUSED && (mode->mpp < 16 || is_5182()))
160 orion_gpio_set_unused(mode->mpp);
162 orion_gpio_set_valid(mode->mpp, !!(mode->type == MPP_GPIO));
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);