2 * arch/arm/mach-mv78x00/mpp.c
4 * MPP functions for Marvell MV78x00 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 mv78xx0_variant(void)
24 mv78xx0_pcie_id(&dev, &rev);
26 if (dev == MV78100_DEV_ID && rev >= MV78100_REV_A0)
27 return MPP_78100_A0_MASK;
29 printk(KERN_ERR "MPP setup: unknown mv78x00 variant "
30 "(dev %#x rev %#x)\n", dev, rev);
34 #define MPP_CTRL(i) (DEV_BUS_VIRT_BASE + (i) * 4)
35 #define MPP_NR_REGS (1 + MPP_MAX/8)
37 void __init mv78xx0_mpp_conf(unsigned int *mpp_list)
39 u32 mpp_ctrl[MPP_NR_REGS];
40 unsigned int variant_mask;
43 variant_mask = mv78xx0_variant();
47 /* Initialize gpiolib. */
50 printk(KERN_DEBUG "initial MPP regs:");
51 for (i = 0; i < MPP_NR_REGS; i++) {
52 mpp_ctrl[i] = readl(MPP_CTRL(i));
53 printk(" %08x", mpp_ctrl[i]);
58 unsigned int num = MPP_NUM(*mpp_list);
59 unsigned int sel = MPP_SEL(*mpp_list);
63 printk(KERN_ERR "mv78xx0_mpp_conf: invalid MPP "
64 "number (%u)\n", num);
67 if (!(*mpp_list & variant_mask)) {
69 "mv78xx0_mpp_conf: requested MPP%u config "
70 "unavailable on this hardware\n", num);
74 shift = (num & 7) << 2;
75 mpp_ctrl[num / 8] &= ~(0xf << shift);
76 mpp_ctrl[num / 8] |= sel << shift;
79 if (*mpp_list & MPP_INPUT_MASK)
80 gpio_mode |= GPIO_INPUT_OK;
81 if (*mpp_list & MPP_OUTPUT_MASK)
82 gpio_mode |= GPIO_OUTPUT_OK;
85 orion_gpio_set_valid(num, gpio_mode);
90 printk(KERN_DEBUG " final MPP regs:");
91 for (i = 0; i < MPP_NR_REGS; i++) {
92 writel(mpp_ctrl[i], MPP_CTRL(i));
93 printk(" %08x", mpp_ctrl[i]);