2 * arch/arm/mach-kirkwood/mpp.c
4 * MPP functions for Marvell Kirkwood 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 unsigned int __init kirkwood_variant(void)
24 kirkwood_pcie_id(&dev, &rev);
26 if ((dev == MV88F6281_DEV_ID && rev >= MV88F6281_REV_A0) ||
27 (dev == MV88F6282_DEV_ID))
28 return MPP_F6281_MASK;
29 if (dev == MV88F6192_DEV_ID && rev >= MV88F6192_REV_A0)
30 return MPP_F6192_MASK;
31 if (dev == MV88F6180_DEV_ID)
32 return MPP_F6180_MASK;
34 printk(KERN_ERR "MPP setup: unknown kirkwood variant "
35 "(dev %#x rev %#x)\n", dev, rev);
39 #define MPP_CTRL(i) (DEV_BUS_VIRT_BASE + (i) * 4)
40 #define MPP_NR_REGS (1 + MPP_MAX/8)
42 void __init kirkwood_mpp_conf(unsigned int *mpp_list)
44 u32 mpp_ctrl[MPP_NR_REGS];
45 unsigned int variant_mask;
48 variant_mask = kirkwood_variant();
52 /* Initialize gpiolib. */
55 printk(KERN_DEBUG "initial MPP regs:");
56 for (i = 0; i < MPP_NR_REGS; i++) {
57 mpp_ctrl[i] = readl(MPP_CTRL(i));
58 printk(" %08x", mpp_ctrl[i]);
63 unsigned int num = MPP_NUM(*mpp_list);
64 unsigned int sel = MPP_SEL(*mpp_list);
68 printk(KERN_ERR "kirkwood_mpp_conf: invalid MPP "
69 "number (%u)\n", num);
72 if (!(*mpp_list & variant_mask)) {
74 "kirkwood_mpp_conf: requested MPP%u config "
75 "unavailable on this hardware\n", num);
79 shift = (num & 7) << 2;
80 mpp_ctrl[num / 8] &= ~(0xf << shift);
81 mpp_ctrl[num / 8] |= sel << shift;
84 if (*mpp_list & MPP_INPUT_MASK)
85 gpio_mode |= GPIO_INPUT_OK;
86 if (*mpp_list & MPP_OUTPUT_MASK)
87 gpio_mode |= GPIO_OUTPUT_OK;
90 orion_gpio_set_valid(num, gpio_mode);
95 printk(KERN_DEBUG " final MPP regs:");
96 for (i = 0; i < MPP_NR_REGS; i++) {
97 writel(mpp_ctrl[i], MPP_CTRL(i));
98 printk(" %08x", mpp_ctrl[i]);