powerpc: add support for the Freescale P1022DS reference board
Specifics:
1) 36-bit only
2) Booting from NOR flash only
3) Environment stored in NOR flash only
4) No SPI support
5) No DIU support
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/board/freescale/p1022ds/ddr.c b/board/freescale/p1022ds/ddr.c
new file mode 100644
index 0000000..7ecfb3e
--- /dev/null
+++ b/board/freescale/p1022ds/ddr.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ * Authors: Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
+ * Timur Tabi <timur@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.
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+#include <asm/fsl_ddr_sdram.h>
+#include <asm/fsl_ddr_dimm_params.h>
+
+unsigned int fsl_ddr_get_mem_data_rate(void)
+{
+ return get_ddr_freq(0);
+}
+
+void fsl_ddr_get_spd(ddr3_spd_eeprom_t *ctrl_dimms_spd, unsigned int ctrl_num)
+{
+ int ret;
+
+ /*
+ * The P1022 has only one DDR controller, and the board has only one
+ * DIMM slot.
+ */
+ ret = i2c_read(SPD_EEPROM_ADDRESS1, 0, 1, (u8 *)ctrl_dimms_spd,
+ sizeof(ddr3_spd_eeprom_t));
+ if (ret) {
+ debug("DDR: failed to read SPD from address %u\n",
+ SPD_EEPROM_ADDRESS1);
+ memset(ctrl_dimms_spd, 0, sizeof(ddr3_spd_eeprom_t));
+ }
+}
+
+typedef struct {
+ u32 datarate_mhz_low;
+ u32 datarate_mhz_high;
+ u32 n_ranks;
+ u32 clk_adjust; /* Range: 0-8 */
+ u32 cpo; /* Range: 2-31 */
+ u32 write_data_delay; /* Range: 0-6 */
+ u32 force_2T;
+} board_specific_parameters_t;
+
+static const board_specific_parameters_t bsp[] = {
+/*
+ * lo| hi| num| clk| cpo|wrdata|2T
+ * mhz| mhz|ranks|adjst| | delay|
+ */
+ { 0, 333, 1, 5, 31, 3, 0},
+ {334, 400, 1, 5, 31, 3, 0},
+ {401, 549, 1, 5, 31, 3, 0},
+ {550, 680, 1, 5, 31, 5, 0},
+ {681, 850, 1, 5, 31, 5, 0},
+ { 0, 333, 2, 5, 31, 3, 0},
+ {334, 400, 2, 5, 31, 3, 0},
+ {401, 549, 2, 5, 31, 3, 0},
+ {550, 680, 2, 5, 31, 5, 0},
+ {681, 850, 2, 5, 31, 5, 0},
+};
+
+void fsl_ddr_board_options(memctl_options_t *popts, dimm_params_t *pdimm,
+ unsigned int ctrl_num)
+{
+ unsigned long ddr_freq;
+ unsigned int i;
+
+ /* set odt_rd_cfg and odt_wr_cfg. */
+ for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
+ popts->cs_local_opts[i].odt_rd_cfg = 0;
+ popts->cs_local_opts[i].odt_wr_cfg = 1;
+ }
+
+ /*
+ * Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
+ * freqency and n_banks specified in board_specific_parameters table.
+ */
+ ddr_freq = get_ddr_freq(0) / 1000000;
+ for (i = 0; i < ARRAY_SIZE(bsp); i++) {
+ if (ddr_freq >= bsp[i].datarate_mhz_low &&
+ ddr_freq <= bsp[i].datarate_mhz_high &&
+ pdimm->n_ranks == bsp[i].n_ranks) {
+ popts->clk_adjust = bsp[i].clk_adjust;
+ popts->cpo_override = bsp[i].cpo;
+ popts->write_data_delay = bsp[i].write_data_delay;
+ popts->twoT_en = bsp[i].force_2T;
+ break;
+ }
+ }
+
+ popts->half_strength_driver_enable = 1;
+
+ /* Per AN4039, enable ZQ calibration. */
+ popts->zq_en = 1;
+
+ /*
+ * For wake-up on ARP, we need auto self refresh enabled
+ */
+ popts->auto_self_refresh_en = 1;
+ popts->sr_it = 0xb;
+}