[U-Boot] [PATCH] board/t104xrdb: Add support of CPLD
Prabhakar Kushwaha
prabhakar at freescale.com
Thu Apr 3 13:18:57 CEST 2014
T1040RDB and T1042RDB_PI has CPLD. Here CPLD controls board mux/features.
This support of CPLD includes
- files and register defintion
- Commands to swtich alternate bank and default bank
Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
---
Changes for v2:
- Updated the cpld command
Changes for v3:
- fix typo
Changes for v4:
- fix typo
Changes for v5:
- fix cpld registers while printing
- rebased on top of below patch
powerpc/t104xrdb: Unification of T104xRDB header files
http://patchwork.ozlabs.org/patch/335207/
board/freescale/t104xrdb/Makefile | 1 +
board/freescale/t104xrdb/cpld.c | 112 +++++++++++++++++++++++++++++++++++
board/freescale/t104xrdb/cpld.h | 40 +++++++++++++
board/freescale/t104xrdb/t104xrdb.c | 13 ++++
include/configs/T104xRDB.h | 8 +++
5 files changed, 174 insertions(+)
create mode 100644 board/freescale/t104xrdb/cpld.c
create mode 100644 board/freescale/t104xrdb/cpld.h
diff --git a/board/freescale/t104xrdb/Makefile b/board/freescale/t104xrdb/Makefile
index e51fb7a..7e7bfb1 100644
--- a/board/freescale/t104xrdb/Makefile
+++ b/board/freescale/t104xrdb/Makefile
@@ -6,6 +6,7 @@
obj-y += t104xrdb.o
+obj-y += cpld.o
obj-y += ddr.o
obj-y += eth.o
obj-$(CONFIG_PCI) += pci.o
diff --git a/board/freescale/t104xrdb/cpld.c b/board/freescale/t104xrdb/cpld.c
new file mode 100644
index 0000000..df0e348
--- /dev/null
+++ b/board/freescale/t104xrdb/cpld.c
@@ -0,0 +1,112 @@
+/**
+ * Copyright 2014 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * This file provides support for the board-specific CPLD used on some Freescale
+ * reference boards.
+ *
+ * The following macros need to be defined:
+ *
+ * CONFIG_SYS_CPLD_BASE-The virtual address of the base of the CPLD register map
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/io.h>
+
+#include "cpld.h"
+
+u8 cpld_read(unsigned int reg)
+{
+ void *p = (void *)CONFIG_SYS_CPLD_BASE;
+
+ return in_8(p + reg);
+}
+
+void cpld_write(unsigned int reg, u8 value)
+{
+ void *p = (void *)CONFIG_SYS_CPLD_BASE;
+
+ out_8(p + reg, value);
+}
+
+/**
+ * Set the boot bank to the alternate bank
+ */
+void cpld_set_altbank(void)
+{
+ u8 reg = CPLD_READ(flash_ctl_status);
+
+ reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK;
+
+ CPLD_WRITE(flash_ctl_status, reg);
+ CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
+}
+
+/**
+ * Set the boot bank to the default bank
+ */
+void cpld_set_defbank(void)
+{
+ u8 reg = CPLD_READ(flash_ctl_status);
+
+ reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK;
+
+ CPLD_WRITE(flash_ctl_status, reg);
+ CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
+}
+
+#ifdef DEBUG
+static void cpld_dump_regs(void)
+{
+ printf("cpld_ver = 0x%02x\n", CPLD_READ(cpld_ver));
+ printf("cpld_ver_sub = 0x%02x\n", CPLD_READ(cpld_ver_sub));
+ printf("hw_ver = 0x%02x\n", CPLD_READ(hw_ver));
+ printf("sw_ver = 0x%02x\n", CPLD_READ(sw_ver));
+ printf("reset_ctl1 = 0x%02x\n", CPLD_READ(reset_ctl1));
+ printf("reset_ctl2 = 0x%02x\n", CPLD_READ(reset_ctl2));
+ printf("int_status = 0x%02x\n", CPLD_READ(int_status));
+ printf("flash_ctl_status = 0x%02x\n", CPLD_READ(flash_ctl_status));
+ printf("fan_ctl_status = 0x%02x\n", CPLD_READ(fan_ctl_status));
+ printf("led_ctl_status = 0x%02x\n", CPLD_READ(led_ctl_status));
+ printf("sfp_ctl_status = 0x%02x\n", CPLD_READ(sfp_ctl_status));
+ printf("misc_ctl_status = 0x%02x\n", CPLD_READ(misc_ctl_status));
+ printf("boot_override = 0x%02x\n", CPLD_READ(boot_override));
+ printf("boot_config1 = 0x%02x\n", CPLD_READ(boot_config1));
+ printf("boot_config2 = 0x%02x\n", CPLD_READ(boot_config2));
+ putc('\n');
+}
+#endif
+
+int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int rc = 0;
+
+ if (argc <= 1)
+ return cmd_usage(cmdtp);
+
+ if (strcmp(argv[1], "reset") == 0) {
+ if (strcmp(argv[2], "altbank") == 0)
+ cpld_set_altbank();
+ else
+ cpld_set_defbank();
+#ifdef DEBUG
+ } else if (strcmp(argv[1], "dump") == 0) {
+ cpld_dump_regs();
+#endif
+ } else
+ rc = cmd_usage(cmdtp);
+
+ return rc;
+}
+
+U_BOOT_CMD(
+ cpld, CONFIG_SYS_MAXARGS, 1, do_cpld,
+ "Reset the board or alternate bank",
+ "reset - hard reset to default bank\n"
+ "cpld reset altbank - reset to alternate bank\n"
+#ifdef DEBUG
+ "cpld dump - display the CPLD registers\n"
+#endif
+ );
diff --git a/board/freescale/t104xrdb/cpld.h b/board/freescale/t104xrdb/cpld.h
new file mode 100644
index 0000000..0da9a01
--- /dev/null
+++ b/board/freescale/t104xrdb/cpld.h
@@ -0,0 +1,40 @@
+/**
+ * Copyright 2013 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * This file provides support for the ngPIXIS, a board-specific FPGA used on
+ * some Freescale reference boards.
+ */
+
+/*
+ * CPLD register set. Feel free to add board-specific #ifdefs where necessary.
+ */
+struct cpld_data {
+ u8 cpld_ver; /* 0x00 - CPLD Major Revision Register */
+ u8 cpld_ver_sub; /* 0x01 - CPLD Minor Revision Register */
+ u8 hw_ver; /* 0x02 - Hardware Revision Register */
+ u8 sw_ver; /* 0x03 - Software Revision register */
+ u8 res0[12]; /* 0x04 - 0x0F - not used */
+ u8 reset_ctl1; /* 0x10 - Reset control Register1 */
+ u8 reset_ctl2; /* 0x11 - Reset control Register2 */
+ u8 int_status; /* 0x12 - Interrupt status Register */
+ u8 flash_ctl_status; /* 0x13 - Flash control and status register */
+ u8 fan_ctl_status; /* 0x14 - Fan control and status register */
+ u8 led_ctl_status; /* 0x15 - LED control and status register */
+ u8 sfp_ctl_status; /* 0x16 - SFP control and status register */
+ u8 misc_ctl_status; /* 0x17 - Miscellanies ctrl & status register*/
+ u8 boot_override; /* 0x18 - Boot override register */
+ u8 boot_config1; /* 0x19 - Boot config override register*/
+ u8 boot_config2; /* 0x1A - Boot config override register*/
+} cpld_data_t;
+
+
+/* Pointer to the CPLD register set */
+
+u8 cpld_read(unsigned int reg);
+void cpld_write(unsigned int reg, u8 value);
+
+#define CPLD_READ(reg) cpld_read(offsetof(struct cpld_data, reg))
+#define CPLD_WRITE(reg, value)\
+ cpld_write(offsetof(struct cpld_data, reg), value)
diff --git a/board/freescale/t104xrdb/t104xrdb.c b/board/freescale/t104xrdb/t104xrdb.c
index 6e29d64..b48133a 100644
--- a/board/freescale/t104xrdb/t104xrdb.c
+++ b/board/freescale/t104xrdb/t104xrdb.c
@@ -19,14 +19,27 @@
#include <fm_eth.h>
#include "t104xrdb.h"
+#include "cpld.h"
DECLARE_GLOBAL_DATA_PTR;
int checkboard(void)
{
struct cpu_type *cpu = gd->arch.cpu;
+ u8 sw;
printf("Board: %sRDB\n", cpu->name);
+ printf("Board rev: 0x%02x CPLD ver: 0x%02x, ",
+ CPLD_READ(hw_ver), CPLD_READ(sw_ver));
+
+ sw = CPLD_READ(flash_ctl_status);
+ sw = ((sw & CPLD_LBMAP_MASK) >> CPLD_LBMAP_SHIFT);
+
+ if (sw <= 7)
+ printf("vBank: %d\n", sw);
+ else
+ printf("Unsupported Bank=%x\n", sw);
+
return 0;
}
diff --git a/include/configs/T104xRDB.h b/include/configs/T104xRDB.h
index 8d2fdb0..2bbb78c 100644
--- a/include/configs/T104xRDB.h
+++ b/include/configs/T104xRDB.h
@@ -179,6 +179,14 @@
#define CONFIG_SYS_FLASH_BANKS_LIST {CONFIG_SYS_FLASH_BASE_PHYS}
/* CPLD on IFC */
+#define CPLD_LBMAP_MASK 0x3F
+#define CPLD_BANK_SEL_MASK 0x07
+#define CPLD_BANK_OVERRIDE 0x40
+#define CPLD_LBMAP_ALTBANK 0x44 /* BANK OR | BANK 4 */
+#define CPLD_LBMAP_DFLTBANK 0x40 /* BANK OR | BANK0 */
+#define CPLD_LBMAP_RESET 0xFF
+#define CPLD_LBMAP_SHIFT 0x03
+
#define CONFIG_SYS_CPLD_BASE 0xffdf0000
#define CONFIG_SYS_CPLD_BASE_PHYS (0xf00000000ull | CONFIG_SYS_CPLD_BASE)
#define CONFIG_SYS_CSPR2_EXT (0xf)
--
1.7.9.5
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