[U-Boot] [PATCH] [v2] p2020ds: add alternate boot bank support using the ngPIXIS FPGA
Timur Tabi
timur at freescale.com
Thu Apr 1 17:49:42 CEST 2010
The Freescale P2020DS board uses a new type of PIXIS FPGA, called the ngPIXIS.
The ngPIXIS has one distinct new feature: the values of the on-board switches
can be selectively overridden with shadow registers. This feature is used to
boot from a different NOR flash bank, instead of having a register dedicated
for this purpose. Because the ngPIXIS is so different from the previous PIXIS,
a new file is introduced: ngpixis.c.
Also update the P2020DS checkboard() function to use the new macros defined
in the header file.
Signed-off-by: Timur Tabi <timur at freescale.com>
---
board/freescale/common/Makefile | 1 +
board/freescale/common/ngpixis.c | 136 +++++++++++++++++++++++++++++++++++++
board/freescale/common/ngpixis.h | 57 +++++++++++++++
board/freescale/p2020ds/p2020ds.c | 55 ++++++----------
include/configs/P2020DS.h | 62 ++---------------
5 files changed, 222 insertions(+), 89 deletions(-)
create mode 100644 board/freescale/common/ngpixis.c
create mode 100644 board/freescale/common/ngpixis.h
diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index 02a824d..620eb16 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -33,6 +33,7 @@ COBJS-${CONFIG_FSL_CADMUS} += cadmus.o
COBJS-${CONFIG_FSL_VIA} += cds_via.o
COBJS-${CONFIG_FSL_DIU_FB} += fsl_diu_fb.o fsl_logo_bmp.o
COBJS-${CONFIG_FSL_PIXIS} += pixis.o
+COBJS-${CONFIG_FSL_NGPIXIS} += ngpixis.o
COBJS-${CONFIG_PQ_MDS_PIB} += pq-mds-pib.o
COBJS-${CONFIG_ID_EEPROM} += sys_eeprom.o
COBJS-${CONFIG_FSL_SGMII_RISER} += sgmii_riser.o
diff --git a/board/freescale/common/ngpixis.c b/board/freescale/common/ngpixis.c
new file mode 100644
index 0000000..bb6794e
--- /dev/null
+++ b/board/freescale/common/ngpixis.c
@@ -0,0 +1,136 @@
+/**
+ * Copyright 2010 Freescale Semiconductor
+ * Author: Timur Tabi <timur at freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This file provides support for the ngPIXIS, a board-specific FPGA used on
+ * some Freescale reference boards.
+ *
+ * A "switch" is black rectangular block on the motherboard. It contains
+ * eight "bits". The ngPIXIS has a set of memory-mapped registers (SWx) that
+ * shadow the actual physical switches. There is also another set of
+ * registers (ENx) that tell the ngPIXIS which bits of SWx should actually be
+ * used to override the values of the bits in the physical switches.
+ *
+ * The following macros need to be defined:
+ *
+ * PIXIS_BASE - The virtual address of the base of the PIXIS register map
+ *
+ * PIXIS_LBMAP_SWITCH - The switch number (i.e. the "x" in "SWx"). This value
+ * is used in the PIXIS_SW() macro to determine which offset in
+ * the PIXIS register map corresponds to the physical switch that controls
+ * the boot bank.
+ *
+ * PIXIS_LBMAP_MASK - A bit mask the defines which bits in SWx to use.
+ *
+ * PIXIS_LBMAP_SHIFT - The shift value that corresponds to PIXIS_LBMAP_MASK.
+ *
+ * PIXIS_LBMAP_ALTBANK - The value to program into SWx to tell the ngPIXIS to
+ * boot from the alternate bank.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <watchdog.h>
+#include <asm/cache.h>
+#include <asm/io.h>
+
+#include "ngpixis.h"
+
+/*
+ * Reset the board. This ignores the ENx registers.
+ */
+void pixis_reset(void)
+{
+ out_8(&pixis->rst, 0);
+
+ while (1);
+}
+
+/*
+ * Reset the board. Like pixis_reset(), but it honors the ENx registers.
+ */
+void pixis_bank_reset(void)
+{
+ out_8(&pixis->vctl, 0);
+ out_8(&pixis->vctl, 1);
+
+ while (1);
+}
+
+/**
+ * Set the boot bank to the power-on default bank
+ */
+void clear_altbank(void)
+{
+ /* Tell the ngPIXIS to use this the bits in the physical switch for the
+ * boot bank value, instead of the SWx register. We need to be careful
+ * only to set the bits in SWx that correspond to the boot bank.
+ */
+ clrbits_8(&PIXIS_EN(PIXIS_LBMAP_SWITCH), PIXIS_LBMAP_MASK);
+}
+
+/**
+ * Set the boot bank to the alternate bank
+ */
+void set_altbank(void)
+{
+ /* Program the alternate bank number into the SWx register.
+ */
+ clrsetbits_8(&PIXIS_SW(PIXIS_LBMAP_SWITCH), PIXIS_LBMAP_MASK,
+ PIXIS_LBMAP_ALTBANK);
+
+ /* Tell the ngPIXIS to use this the bits in the SWx register for the
+ * boot bank value, instead of the physical switch. We need to be
+ * careful only to set the bits in SWx that correspond to the boot bank.
+ */
+ setbits_8(&PIXIS_EN(PIXIS_LBMAP_SWITCH), PIXIS_LBMAP_MASK);
+}
+
+
+int pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ unsigned int i;
+ char *p_altbank = NULL;
+ char *unknown_param = NULL;
+
+ /* No args is a simple reset request.
+ */
+ if (argc <= 1)
+ pixis_reset();
+
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "altbank") == 0) {
+ p_altbank = argv[i];
+ continue;
+ }
+
+ unknown_param = argv[i];
+ }
+
+ if (unknown_param) {
+ printf("Invalid option: %s\n", unknown_param);
+ return 1;
+ }
+
+ if (p_altbank)
+ set_altbank();
+ else
+ clear_altbank();
+
+ pixis_bank_reset();
+
+ /* Shouldn't be reached. */
+ return 0;
+}
+
+U_BOOT_CMD(
+ pixis_reset, CONFIG_SYS_MAXARGS, 1, pixis_reset_cmd,
+ "Reset the board using the FPGA sequencer",
+ "- hard reset to default bank\n"
+ "pixis_reset altbank - reset to alternate bank\n"
+ );
diff --git a/board/freescale/common/ngpixis.h b/board/freescale/common/ngpixis.h
new file mode 100644
index 0000000..284d044
--- /dev/null
+++ b/board/freescale/common/ngpixis.h
@@ -0,0 +1,57 @@
+/**
+ * Copyright 2010 Freescale Semiconductor
+ * Author: Timur Tabi <timur at freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This file provides support for the ngPIXIS, a board-specific FPGA used on
+ * some Freescale reference boards.
+ */
+
+/* ngPIXIS register set. Hopefully, this won't change too much over time.
+ * Feel free to add board-specific #ifdefs where necessary.
+ */
+typedef struct ngpixis {
+ u8 id;
+ u8 arch;
+ u8 scver;
+ u8 csr;
+ u8 rst;
+ u8 res1;
+ u8 aux;
+ u8 spd;
+ u8 brdcfg0;
+ u8 dma;
+ u8 addr;
+ u8 res2[2];
+ u8 data;
+ u8 led;
+ u8 res3;
+ u8 vctl;
+ u8 vstat;
+ u8 vcfgen0;
+ u8 res4;
+ u8 ocmcsr;
+ u8 ocmmsg;
+ u8 gmdbg;
+ u8 res5[2];
+ u8 sclk[3];
+ u8 dclk[3];
+ u8 watch;
+ struct {
+ u8 sw;
+ u8 en;
+ } s[8];
+} ngpixis_t __attribute__ ((aligned(1)));
+
+/* Pointer to the PIXIS register set */
+#define pixis ((ngpixis_t *)PIXIS_BASE)
+
+/* The PIXIS SW register that corresponds to board switch X, where x >= 1 */
+#define PIXIS_SW(x) (pixis->s[(x) - 1].sw)
+
+/* The PIXIS EN register that corresponds to board switch X, where x >= 1 */
+#define PIXIS_EN(x) (pixis->s[(x) - 1].en)
diff --git a/board/freescale/p2020ds/p2020ds.c b/board/freescale/p2020ds/p2020ds.c
index 664135c..f0ff209 100644
--- a/board/freescale/p2020ds/p2020ds.c
+++ b/board/freescale/p2020ds/p2020ds.c
@@ -38,6 +38,7 @@
#include <asm/mp.h>
#include <netdev.h>
+#include "../common/ngpixis.h"
#include "../common/sgmii_riser.h"
DECLARE_GLOBAL_DATA_PTR;
@@ -46,30 +47,24 @@ phys_size_t fixed_sdram(void);
int checkboard(void)
{
- u8 sw7;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
+ u8 sw;
puts("Board: P2020DS ");
#ifdef CONFIG_PHYS_64BIT
puts("(36-bit addrmap) ");
#endif
- printf("Sys ID: 0x%02x, "
- "Sys Ver: 0x%02x, FPGA Ver: 0x%02x, ",
- in_8(pixis_base + PIXIS_ID), in_8(pixis_base + PIXIS_VER),
- in_8(pixis_base + PIXIS_PVER));
+ printf("Sys ID: 0x%02x, Sys Ver: 0x%02x, FPGA Ver: 0x%02x, ",
+ in_8(&pixis->id), in_8(&pixis->arch), in_8(&pixis->scver));
- sw7 = in_8(pixis_base + PIXIS_SW(7));
- switch ((sw7 & PIXIS_SW7_LBMAP) >> 6) {
- case 0:
- case 1:
- printf ("vBank: %d\n", ((sw7 & PIXIS_SW7_VBANK) >> 4));
- break;
- case 2:
- case 3:
- puts ("Promjet\n");
- break;
- }
+ sw = in_8(&PIXIS_SW(PIXIS_LBMAP_SWITCH));
+ sw = (sw & PIXIS_LBMAP_MASK) >> PIXIS_LBMAP_SHIFT;
+
+ if (sw < 0x8)
+ /* The lower two bits are the actual vbank number */
+ printf("vBank: %d\n", sw & 3);
+ else
+ puts("Promjet\n");
return 0;
}
@@ -370,30 +365,22 @@ unsigned long get_board_ddr_clk(ulong dummy)
return gd->mem_clk;
}
-unsigned long
-calculate_board_sys_clk(ulong dummy)
+unsigned long calculate_board_sys_clk(ulong dummy)
{
ulong val;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
- val = ics307_clk_freq(
- in_8(pixis_base + PIXIS_VSYSCLK0),
- in_8(pixis_base + PIXIS_VSYSCLK1),
- in_8(pixis_base + PIXIS_VSYSCLK2));
+ val = ics307_clk_freq(in_8(&pixis->sclk[0]), in_8(&pixis->sclk[1]),
+ in_8(&pixis->sclk[2]));
debug("sysclk val = %lu\n", val);
return val;
}
-unsigned long
-calculate_board_ddr_clk(ulong dummy)
+unsigned long calculate_board_ddr_clk(ulong dummy)
{
ulong val;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
- val = ics307_clk_freq(
- in_8(pixis_base + PIXIS_VDDRCLK0),
- in_8(pixis_base + PIXIS_VDDRCLK1),
- in_8(pixis_base + PIXIS_VDDRCLK2));
+ val = ics307_clk_freq(in_8(&pixis->dclk[0]), in_8(&pixis->dclk[1]),
+ in_8(&pixis->dclk[2]));
debug("ddrclk val = %lu\n", val);
return val;
}
@@ -402,9 +389,8 @@ unsigned long get_board_sys_clk(ulong dummy)
{
u8 i;
ulong val = 0;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
- i = in_8(pixis_base + PIXIS_SPD);
+ i = in_8(&pixis->spd);
i &= 0x07;
switch (i) {
@@ -441,9 +427,8 @@ unsigned long get_board_ddr_clk(ulong dummy)
{
u8 i;
ulong val = 0;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
- i = in_8(pixis_base + PIXIS_SPD);
+ i = in_8(&pixis->spd);
i &= 0x38;
i >>= 3;
diff --git a/include/configs/P2020DS.h b/include/configs/P2020DS.h
index 30a5a31..66be725 100644
--- a/include/configs/P2020DS.h
+++ b/include/configs/P2020DS.h
@@ -238,7 +238,9 @@ extern unsigned long calculate_board_ddr_clk(unsigned long dummy);
#define CONFIG_BOARD_EARLY_INIT_R /* call board_early_init_r function */
-#define CONFIG_FSL_PIXIS 1 /* use common PIXIS code */
+#define CONFIG_FSL_NGPIXIS /* use common ngPIXIS code */
+
+#ifdef CONFIG_FSL_NGPIXIS
#define PIXIS_BASE 0xffdf0000 /* PIXIS registers */
#ifdef CONFIG_PHYS_64BIT
#define PIXIS_BASE_PHYS 0xfffdf0000ull
@@ -249,59 +251,11 @@ extern unsigned long calculate_board_ddr_clk(unsigned long dummy);
#define CONFIG_SYS_BR3_PRELIM (BR_PHYS_ADDR(PIXIS_BASE_PHYS) | BR_PS_8 | BR_V)
#define CONFIG_SYS_OR3_PRELIM 0xffffeff7 /* 32KB but only 4k mapped */
-#define PIXIS_ID 0x0 /* Board ID at offset 0 */
-#define PIXIS_VER 0x1 /* Board version at offset 1 */
-#define PIXIS_PVER 0x2 /* PIXIS FPGA version at offset 2 */
-#define PIXIS_CSR 0x3 /* PIXIS General control/status register */
-#define PIXIS_RST 0x4 /* PIXIS Reset Control register */
-#define PIXIS_PWR 0x5 /* PIXIS Power status register */
-#define PIXIS_AUX 0x6 /* Auxiliary 1 register */
-#define PIXIS_SPD 0x7 /* Register for SYSCLK speed */
-#define PIXIS_AUX2 0x8 /* Auxiliary 2 register */
-#define PIXIS_VCTL 0x10 /* VELA Control Register */
-#define PIXIS_VSTAT 0x11 /* VELA Status Register */
-#define PIXIS_VCFGEN0 0x12 /* VELA Config Enable 0 */
-#define PIXIS_VCFGEN1 0x13 /* VELA Config Enable 1 */
-#define PIXIS_VCORE0 0x14 /* VELA VCORE0 Register */
-#define PIXIS_VBOOT 0x16 /* VELA VBOOT Register */
-#define PIXIS_VSPEED0 0x17 /* VELA VSpeed 0 */
-#define PIXIS_VSPEED1 0x18 /* VELA VSpeed 1 */
-#define PIXIS_VSPEED2 0x19 /* VELA VSpeed 2 */
-#define PIXIS_VSYSCLK0 0x19 /* VELA SYSCLK0 Register */
-#define PIXIS_VSYSCLK1 0x1A /* VELA SYSCLK1 Register */
-#define PIXIS_VSYSCLK2 0x1B /* VELA SYSCLK2 Register */
-#define PIXIS_VDDRCLK0 0x1C /* VELA DDRCLK0 Register */
-#define PIXIS_VDDRCLK1 0x1D /* VELA DDRCLK1 Register */
-#define PIXIS_VDDRCLK2 0x1E /* VELA DDRCLK2 Register */
-
-#define PIXIS_VWATCH 0x24 /* Watchdog Register */
-#define PIXIS_LED 0x25 /* LED Register */
-
-#define PIXIS_SW(x) 0x20 + (x - 1) * 2
-#define PIXIS_EN(x) 0x21 + (x - 1) * 2
-#define PIXIS_SW7_LBMAP 0xc0 /* SW7 - cfg_lbmap */
-#define PIXIS_SW7_VBANK 0x30 /* SW7 - cfg_vbank */
-
-/* old pixis referenced names */
-#define PIXIS_VCLKH 0x19 /* VELA VCLKH register */
-#define PIXIS_VCLKL 0x1A /* VELA VCLKL register */
-#define CONFIG_SYS_PIXIS_VBOOT_MASK 0xc0
-#define PIXIS_VSPEED2_TSEC1SER 0x8
-#define PIXIS_VSPEED2_TSEC2SER 0x4
-#define PIXIS_VSPEED2_TSEC3SER 0x2
-#define PIXIS_VSPEED2_TSEC4SER 0x1
-#define PIXIS_VCFGEN1_TSEC1SER 0x20
-#define PIXIS_VCFGEN1_TSEC2SER 0x20
-#define PIXIS_VCFGEN1_TSEC3SER 0x20
-#define PIXIS_VCFGEN1_TSEC4SER 0x20
-#define PIXIS_VSPEED2_MASK (PIXIS_VSPEED2_TSEC1SER \
- | PIXIS_VSPEED2_TSEC2SER \
- | PIXIS_VSPEED2_TSEC3SER \
- | PIXIS_VSPEED2_TSEC4SER)
-#define PIXIS_VCFGEN1_MASK (PIXIS_VCFGEN1_TSEC1SER \
- | PIXIS_VCFGEN1_TSEC2SER \
- | PIXIS_VCFGEN1_TSEC3SER \
- | PIXIS_VCFGEN1_TSEC4SER)
+#define PIXIS_LBMAP_SWITCH 7
+#define PIXIS_LBMAP_MASK 0xf0
+#define PIXIS_LBMAP_SHIFT 4
+#define PIXIS_LBMAP_ALTBANK 0x20
+#endif
#define CONFIG_SYS_INIT_RAM_LOCK 1
#define CONFIG_SYS_INIT_RAM_ADDR 0xffd00000 /* Initial L1 address */
--
1.6.5
More information about the U-Boot
mailing list