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 static unsigned char hgpio[] = {
38 0, 1, 2, 3, 4, 5, 6, 7, /* GPIO[0..7] on AD[24..31] */
39 17, 18, 19, 20, 21, 22, 23, /* GPIO[17..23] on AD[9..15] */
40 16, /* GPIO[16] on WEn[1] */
41 8, 9 /* GPIO[8..9] on WEn[2..3] */
44 void __init mv78xx0_mpp_conf(unsigned int *mpp_list)
46 u32 mpp_ctrl[MPP_NR_REGS];
47 unsigned int variant_mask;
50 variant_mask = mv78xx0_variant();
54 /* Initialize gpiolib. */
55 // orion_gpio_init(); /* already been done in irq.c */
57 printk(KERN_DEBUG "initial MPP regs:");
58 for (i = 0; i < MPP_NR_REGS; i++) {
59 mpp_ctrl[i] = readl(MPP_CTRL(i));
60 printk(" %08x", mpp_ctrl[i]);
64 for ( ; *mpp_list; mpp_list++) {
65 unsigned int num = MPP_NUM(*mpp_list);
66 unsigned int sel = MPP_SEL(*mpp_list);
70 printk(KERN_ERR "mv78xx0_mpp_conf: invalid MPP "
71 "number (%u)\n", num);
74 if (!(*mpp_list & variant_mask)) {
76 "mv78xx0_mpp_conf: requested MPP%u config "
77 "unavailable on this hardware\n", num);
81 shift = (num & 7) << 2;
82 mpp_ctrl[num / 8] &= ~(0xf << shift);
83 mpp_ctrl[num / 8] |= sel << shift;
86 if (*mpp_list & MPP_INPUT_MASK)
87 gpio_mode |= GPIO_INPUT_OK;
88 if (*mpp_list & MPP_OUTPUT_MASK)
89 gpio_mode |= GPIO_OUTPUT_OK;
90 if (num > 31 && sel == 0x01) {
91 /* printk(KERN_ERR "high GPIO %d -> %d\n", num, hgpio[num-32]); */
92 orion_gpio_set_valid(hgpio[num-32], gpio_mode);
96 orion_gpio_set_valid(num, gpio_mode);
102 printk(KERN_DEBUG " final MPP regs:");
103 for (i = 0; i < MPP_NR_REGS; i++) {
104 writel(mpp_ctrl[i], MPP_CTRL(i));
105 printk(" %08x", mpp_ctrl[i]);