--- /dev/null
+/*
+ * Copyright 2011 Freescale Semiconductor
+ * Author: Shengzhou Liu <Shengzhou.Liu@freescale.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * This file provides support for the QIXIS of some Freescale reference boards.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/io.h>
+#include <linux/time.h>
+#include <i2c.h>
+#include "qixis.h"
+
+#ifdef CONFIG_SYS_I2C_FPGA_ADDR
+u8 qixis_read_i2c(unsigned int reg)
+{
+ return i2c_reg_read(CONFIG_SYS_I2C_FPGA_ADDR, reg);
+}
+
+void qixis_write_i2c(unsigned int reg, u8 value)
+{
+ u8 val = value;
+ i2c_reg_write(CONFIG_SYS_I2C_FPGA_ADDR, reg, val);
+}
+#endif
+
+u8 qixis_read(unsigned int reg)
+{
+ void *p = (void *)QIXIS_BASE;
+
+ return in_8(p + reg);
+}
+
+void qixis_write(unsigned int reg, u8 value)
+{
+ void *p = (void *)QIXIS_BASE;
+
+ out_8(p + reg, value);
+}
+
+u16 qixis_read_minor(void)
+{
+ u16 minor;
+
+ /* this data is in little endian */
+ QIXIS_WRITE(tagdata, 5);
+ minor = QIXIS_READ(tagdata);
+ QIXIS_WRITE(tagdata, 6);
+ minor += QIXIS_READ(tagdata) << 8;
+
+ return minor;
+}
+
+char *qixis_read_time(char *result)
+{
+ time_t time = 0;
+ int i;
+
+ /* timestamp is in 32-bit big endian */
+ for (i = 8; i <= 11; i++) {
+ QIXIS_WRITE(tagdata, i);
+ time = (time << 8) + QIXIS_READ(tagdata);
+ }
+
+ return ctime_r(&time, result);
+}
+
+char *qixis_read_tag(char *buf)
+{
+ int i;
+ char tag, *ptr = buf;
+
+ for (i = 16; i <= 63; i++) {
+ QIXIS_WRITE(tagdata, i);
+ tag = QIXIS_READ(tagdata);
+ *(ptr++) = tag;
+ if (!tag)
+ break;
+ }
+ if (i > 63)
+ *ptr = '\0';
+
+ return buf;
+}
+
+/*
+ * return the string of binary of u8 in the format of
+ * 1010 10_0. The masked bit is filled as underscore.
+ */
+const char *byte_to_binary_mask(u8 val, u8 mask, char *buf)
+{
+ char *ptr;
+ int i;
+
+ ptr = buf;
+ for (i = 0x80; i > 0x08 ; i >>= 1, ptr++)
+ *ptr = (val & i) ? '1' : ((mask & i) ? '_' : '0');
+ *(ptr++) = ' ';
+ for (i = 0x08; i > 0 ; i >>= 1, ptr++)
+ *ptr = (val & i) ? '1' : ((mask & i) ? '_' : '0');
+
+ *ptr = '\0';
+
+ return buf;
+}
+
+#ifdef QIXIS_RST_FORCE_MEM
+void board_assert_mem_reset(void)
+{
+ u8 rst;
+
+ rst = QIXIS_READ(rst_frc[0]);
+ if (!(rst & QIXIS_RST_FORCE_MEM))
+ QIXIS_WRITE(rst_frc[0], rst | QIXIS_RST_FORCE_MEM);
+}
+
+void board_deassert_mem_reset(void)
+{
+ u8 rst;
+
+ rst = QIXIS_READ(rst_frc[0]);
+ if (rst & QIXIS_RST_FORCE_MEM)
+ QIXIS_WRITE(rst_frc[0], rst & ~QIXIS_RST_FORCE_MEM);
+}
+#endif
+
+void qixis_reset(void)
+{
+ QIXIS_WRITE(rst_ctl, QIXIS_RST_CTL_RESET);
+}
+
+void qixis_bank_reset(void)
+{
+ QIXIS_WRITE(rcfg_ctl, QIXIS_RCFG_CTL_RECONFIG_IDLE);
+ QIXIS_WRITE(rcfg_ctl, QIXIS_RCFG_CTL_RECONFIG_START);
+}
+
+/* Set the boot bank to the power-on default bank */
+void clear_altbank(void)
+{
+ u8 reg;
+
+ reg = QIXIS_READ(brdcfg[0]);
+ reg = (reg & ~QIXIS_LBMAP_MASK) | QIXIS_LBMAP_DFLTBANK;
+ QIXIS_WRITE(brdcfg[0], reg);
+}
+
+/* Set the boot bank to the alternate bank */
+void set_altbank(void)
+{
+ u8 reg;
+
+ reg = QIXIS_READ(brdcfg[0]);
+ reg = (reg & ~QIXIS_LBMAP_MASK) | QIXIS_LBMAP_ALTBANK;
+ QIXIS_WRITE(brdcfg[0], reg);
+}
+
+static void qixis_dump_regs(void)
+{
+ int i;
+
+ printf("id = %02x\n", QIXIS_READ(id));
+ printf("arch = %02x\n", QIXIS_READ(arch));
+ printf("scver = %02x\n", QIXIS_READ(scver));
+ printf("model = %02x\n", QIXIS_READ(model));
+ printf("rst_ctl = %02x\n", QIXIS_READ(rst_ctl));
+ printf("aux = %02x\n", QIXIS_READ(aux));
+ for (i = 0; i < 16; i++)
+ printf("brdcfg%02d = %02x\n", i, QIXIS_READ(brdcfg[i]));
+ for (i = 0; i < 16; i++)
+ printf("dutcfg%02d = %02x\n", i, QIXIS_READ(dutcfg[i]));
+ printf("sclk = %02x%02x%02x\n", QIXIS_READ(sclk[0]),
+ QIXIS_READ(sclk[1]), QIXIS_READ(sclk[2]));
+ printf("dclk = %02x%02x%02x\n", QIXIS_READ(dclk[0]),
+ QIXIS_READ(dclk[1]), QIXIS_READ(dclk[2]));
+ printf("aux = %02x\n", QIXIS_READ(aux));
+ printf("watch = %02x\n", QIXIS_READ(watch));
+ printf("ctl_sys = %02x\n", QIXIS_READ(ctl_sys));
+ printf("rcw_ctl = %02x\n", QIXIS_READ(rcw_ctl));
+ printf("present = %02x\n", QIXIS_READ(present));
+ printf("present2 = %02x\n", QIXIS_READ(present2));
+ printf("clk_spd = %02x\n", QIXIS_READ(clk_spd));
+ printf("stat_dut = %02x\n", QIXIS_READ(stat_dut));
+ printf("stat_sys = %02x\n", QIXIS_READ(stat_sys));
+ printf("stat_alrm = %02x\n", QIXIS_READ(stat_alrm));
+}
+
+static void __qixis_dump_switch(void)
+{
+ puts("Reverse engineering switch is not implemented for this board\n");
+}
+
+void qixis_dump_switch(void)
+ __attribute__((weak, alias("__qixis_dump_switch")));
+
+int qixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int i;
+
+ if (argc <= 1) {
+ clear_altbank();
+ qixis_reset();
+ } else if (strcmp(argv[1], "altbank") == 0) {
+ set_altbank();
+ qixis_bank_reset();
+ } else if (strcmp(argv[1], "watchdog") == 0) {
+ static char *period[9] = {"2s", "4s", "8s", "16s", "32s",
+ "1min", "2min", "4min", "8min"};
+ u8 rcfg = QIXIS_READ(rcfg_ctl);
+
+ if (argv[2] == NULL) {
+ printf("qixis watchdog <watchdog_period>\n");
+ return 0;
+ }
+ for (i = 0; i < ARRAY_SIZE(period); i++) {
+ if (strcmp(argv[2], period[i]) == 0) {
+ /* disable watchdog */
+ QIXIS_WRITE(rcfg_ctl,
+ rcfg & ~QIXIS_RCFG_CTL_WATCHDOG_ENBLE);
+ QIXIS_WRITE(watch, ((i<<2) - 1));
+ QIXIS_WRITE(rcfg_ctl, rcfg);
+ return 0;
+ }
+ }
+ } else if (strcmp(argv[1], "dump") == 0) {
+ qixis_dump_regs();
+ return 0;
+ } else if (strcmp(argv[1], "switch") == 0) {
+ qixis_dump_switch();
+ return 0;
+ } else {
+ printf("Invalid option: %s\n", argv[1]);
+ return 1;
+ }
+
+ return 0;
+}
+
+U_BOOT_CMD(
+ qixis_reset, CONFIG_SYS_MAXARGS, 1, qixis_reset_cmd,
+ "Reset the board using the FPGA sequencer",
+ "- hard reset to default bank\n"
+ "qixis_reset altbank - reset to alternate bank\n"
+ "qixis watchdog <watchdog_period> - set the watchdog period\n"
+ " period: 1s 2s 4s 8s 16s 32s 1min 2min 4min 8min\n"
+ "qixis_reset dump - display the QIXIS registers\n"
+ "qixis_reset switch - display switch\n"
+ );
Code Review / kvmfornfv.git / blobdiff