1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2013 - 2017 Xilinx Inc.
9 #include <asm/arch/hardware.h>
10 #include <asm/arch/sys_proto.h>
12 #define SLCR_LOCK_MAGIC 0x767B
13 #define SLCR_UNLOCK_MAGIC 0xDF0D
15 #define SLCR_NAND_L2_SEL 0x10
16 #define SLCR_NAND_L2_SEL_MASK 0x1F
18 #define SLCR_USB_L1_SEL 0x04
20 #define SLCR_IDCODE_MASK 0x1F000
21 #define SLCR_IDCODE_SHIFT 12
24 * zynq_slcr_mio_get_status - Get the status of MIO peripheral.
26 * @peri_name: Name of the peripheral for checking MIO status
27 * @get_pins: Pointer to array of get pin for this peripheral
28 * @num_pins: Number of pins for this peripheral
30 * @check_val: Required check value to get the status of periph
32 struct zynq_slcr_mio_get_status {
33 const char *peri_name;
40 static const int nand8_pins[] = {
41 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
44 static const int nand16_pins[] = {
45 16, 17, 18, 19, 20, 21, 22, 23
48 static const int usb0_pins[] = {
49 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39
52 static const int usb1_pins[] = {
53 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
56 static const struct zynq_slcr_mio_get_status mio_periphs[] = {
60 ARRAY_SIZE(nand8_pins),
61 SLCR_NAND_L2_SEL_MASK,
67 ARRAY_SIZE(nand16_pins),
68 SLCR_NAND_L2_SEL_MASK,
74 ARRAY_SIZE(usb0_pins),
81 ARRAY_SIZE(usb1_pins),
87 static int slcr_lock = 1; /* 1 means locked, 0 means unlocked */
89 void zynq_slcr_lock(void)
92 writel(SLCR_LOCK_MAGIC, &slcr_base->slcr_lock);
97 void zynq_slcr_unlock(void)
100 writel(SLCR_UNLOCK_MAGIC, &slcr_base->slcr_unlock);
105 /* Reset the entire system */
106 void zynq_slcr_cpu_reset(void)
109 * Unlock the SLCR then reset the system.
110 * Note that this seems to require raw i/o
111 * functions or there's a lockup?
116 * Clear 0x0F000000 bits of reboot status register to workaround
117 * the FSBL not loading the bitstream after soft-reboot
118 * This is a temporary solution until we know more.
120 clrbits_le32(&slcr_base->reboot_status, 0xF000000);
122 writel(1, &slcr_base->pss_rst_ctrl);
125 void zynq_slcr_devcfg_disable(void)
131 /* Disable AXI interface by asserting FPGA resets */
132 writel(0xF, &slcr_base->fpga_rst_ctrl);
134 /* Disable Level shifters before setting PS-PL */
135 reg_val = readl(&slcr_base->lvl_shftr_en);
137 writel(reg_val, &slcr_base->lvl_shftr_en);
139 /* Set Level Shifters DT618760 */
140 writel(0xA, &slcr_base->lvl_shftr_en);
145 void zynq_slcr_devcfg_enable(void)
149 /* Set Level Shifters DT618760 */
150 writel(0xF, &slcr_base->lvl_shftr_en);
152 /* Enable AXI interface by de-asserting FPGA resets */
153 writel(0x0, &slcr_base->fpga_rst_ctrl);
158 u32 zynq_slcr_get_boot_mode(void)
160 /* Get the bootmode register value */
161 return readl(&slcr_base->boot_mode);
164 u32 zynq_slcr_get_idcode(void)
166 return (readl(&slcr_base->pss_idcode) & SLCR_IDCODE_MASK) >>
171 * zynq_slcr_get_mio_pin_status - Get the MIO pin status of peripheral.
173 * @periph: Name of the peripheral
175 * Returns count to indicate the number of pins configured for the
178 int zynq_slcr_get_mio_pin_status(const char *periph)
180 const struct zynq_slcr_mio_get_status *mio_ptr;
185 for (i = 0; i < ARRAY_SIZE(mio_periphs); i++) {
186 if (strcmp(periph, mio_periphs[i].peri_name) == 0) {
187 mio_ptr = &mio_periphs[i];
188 for (j = 0; j < mio_ptr->num_pins; j++) {
189 val = readl(&slcr_base->mio_pin
190 [mio_ptr->get_pins[j]]);
191 if ((val & mio_ptr->mask) == mio_ptr->check_val)