1 files changed, 386 insertions, 0 deletions
diff --git a/arch/arm/cpu/tegra20-common/warmboot.c b/arch/arm/cpu/tegra20-common/warmboot.c
new file mode 100644
index 000000000..809ea0133
--- /dev/null
+++ b/arch/arm/cpu/tegra20-common/warmboot.c
@@ -0,0 +1,386 @@
+/*
+ * (C) Copyright 2010 - 2011
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/arch/ap20.h>
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/pmc.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/tegra20.h>
+#include <asm/arch/fuse.h>
+#include <asm/arch/emc.h>
+#include <asm/arch/gp_padctrl.h>
+#include <asm/arch/warmboot.h>
+#include <asm/arch/sdram_param.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifndef CONFIG_TEGRA_CLOCK_SCALING
+#error "You must enable CONFIG_TEGRA_CLOCK_SCALING to use CONFIG_TEGRA20_LP0"
+#endif
+
+/*
+ * This is the place in SRAM where the SDRAM parameters are stored. There
+ * are 4 blocks, one for each RAM code
+ */
+#define SDRAM_PARAMS_BASE	(AP20_BASE_PA_SRAM + 0x188)
+
+/* TODO: If we later add support for the Misc GP controller, refactor this */
+union xm2cfga_reg {
+	struct {
+		u32 reserved0:2;
+		u32 hsm_en:1;
+		u32 reserved1:2;
+		u32 preemp_en:1;
+		u32 vref_en:1;
+		u32 reserved2:5;
+		u32 cal_drvdn:5;
+		u32 reserved3:3;
+		u32 cal_drvup:5;
+		u32 reserved4:3;
+		u32 cal_drvdn_slwr:2;
+		u32 cal_drvup_slwf:2;
+	};
+	u32 word;
+};
+
+union xm2cfgd_reg {
+	struct {
+		u32 reserved0:2;
+		u32 hsm_en:1;
+		u32 schmt_en:1;
+		u32 lpmd:2;
+		u32 vref_en:1;
+		u32 reserved1:5;
+		u32 cal_drvdn:5;
+		u32 reserved2:3;
+		u32 cal_drvup:5;
+		u32 reserved3:3;
+		u32 cal_drvdn_slwr:2;
+		u32 cal_drvup_slwf:2;
+	};
+	u32 word;
+};
+
+/*
+ * TODO: This register is not documented in the TRM yet. We could move this
+ * into the EMC and give it a proper interface, but not while it is
+ * undocumented.
+ */
+union fbio_spare_reg {
+	struct {
+		u32 reserved:24;
+		u32 cfg_wb0:8;
+	};
+	u32 word;
+};
+
+/* We pack the resume information into these unions for later */
+union scratch2_reg {
+	struct {
+		u32 pllm_base_divm:5;
+		u32 pllm_base_divn:10;
+		u32 pllm_base_divp:3;
+		u32 pllm_misc_lfcon:4;
+		u32 pllm_misc_cpcon:4;
+		u32 gp_xm2cfga_padctrl_preemp:1;
+		u32 gp_xm2cfgd_padctrl_schmt:1;
+		u32 osc_ctrl_xobp:1;
+		u32 memory_type:3;
+	};
+	u32 word;
+};
+
+union scratch4_reg {
+	struct {
+		u32 emc_clock_divider:8;
+		u32 pllm_stable_time:8;
+		u32 pllx_stable_time:8;
+		u32 emc_fbio_spare_cfg_wb0:8;
+	};
+	u32 word;
+};
+
+union scratch24_reg {
+	struct {
+		u32 emc_auto_cal_wait:8;
+		u32 emc_pin_program_wait:8;
+		u32 warmboot_wait:8;
+		u32 reserved:8;
+	};
+	u32 word;
+};
+
+int warmboot_save_sdram_params(void)
+{
+	u32 ram_code;
+	struct sdram_params sdram;
+	struct pmux_tri_ctlr *pmt = (struct pmux_tri_ctlr *)NV_PA_APB_MISC_BASE;
+	struct pmc_ctlr *pmc = (struct pmc_ctlr *)TEGRA20_PMC_BASE;
+	struct apb_misc_gp_ctlr *gp =
+			(struct apb_misc_gp_ctlr *)TEGRA20_APB_MISC_GP_BASE;
+	struct emc_ctlr *emc = emc_get_controller(gd->fdt_blob);
+	union scratch2_reg scratch2;
+	union scratch4_reg scratch4;
+	union scratch24_reg scratch24;
+	union xm2cfga_reg xm2cfga;
+	union xm2cfgd_reg xm2cfgd;
+	union fbio_spare_reg fbio_spare;
+
+	/* get ram code that is used as index to array sdram_params in BCT */
+	ram_code = (readl(&pmt->pmt_strap_opt_a) >>
+			STRAP_OPT_A_RAM_CODE_SHIFT) & 3;
+	memcpy(&sdram,
+	       (char *)((struct sdram_params *)SDRAM_PARAMS_BASE + ram_code),
+	       sizeof(sdram));
+
+	xm2cfga.word = readl(&gp->xm2cfga);
+	xm2cfgd.word = readl(&gp->xm2cfgd);
+
+	scratch2.word = 0;
+	scratch2.osc_ctrl_xobp = clock_get_osc_bypass();
+
+	/* Get the memory PLL settings */
+	{
+		u32 divm, divn, divp, cpcon, lfcon;
+
+		if (clock_ll_read_pll(CLOCK_ID_MEMORY, &divm, &divn, &divp,
+					&cpcon, &lfcon))
+			return -1;
+		scratch2.pllm_base_divm = divm;
+		scratch2.pllm_base_divn = divn;
+		scratch2.pllm_base_divp = divp;
+		scratch2.pllm_misc_cpcon = cpcon;
+		scratch2.pllm_misc_lfcon = lfcon;
+	}
+
+	scratch2.gp_xm2cfga_padctrl_preemp = xm2cfga.preemp_en;
+	scratch2.gp_xm2cfgd_padctrl_schmt = xm2cfgd.schmt_en;
+	scratch2.memory_type = sdram.memory_type;
+	writel(scratch2.word, &pmc->pmc_scratch2);
+
+	/* collect data from various sources for pmc_scratch4 */
+	fbio_spare.word = readl(&emc->fbio_spare);
+	scratch4.word = 0;
+	scratch4.emc_fbio_spare_cfg_wb0 = fbio_spare.cfg_wb0;
+	scratch4.emc_clock_divider = sdram.emc_clock_divider;
+	scratch4.pllm_stable_time = -1;
+	scratch4.pllx_stable_time = -1;
+	writel(scratch4.word, &pmc->pmc_scratch4);
+
+	/* collect various data from sdram for pmc_scratch24 */
+	scratch24.word = 0;
+	scratch24.emc_pin_program_wait = sdram.emc_pin_program_wait;
+	scratch24.emc_auto_cal_wait = sdram.emc_auto_cal_wait;
+	scratch24.warmboot_wait = sdram.warm_boot_wait;
+	writel(scratch24.word, &pmc->pmc_scratch24);
+
+	return 0;
+}
+
+static u32 get_major_version(void)
+{
+	u32 major_id;
+	struct apb_misc_gp_ctlr *gp =
+		(struct apb_misc_gp_ctlr *)TEGRA20_APB_MISC_GP_BASE;
+
+	major_id = (readl(&gp->hidrev) & HIDREV_MAJORPREV_MASK) >>
+			HIDREV_MAJORPREV_SHIFT;
+	return major_id;
+}
+
+static int is_production_mode_fuse_set(struct fuse_regs *fuse)
+{
+	return readl(&fuse->production_mode);
+}
+
+static int is_odm_production_mode_fuse_set(struct fuse_regs *fuse)
+{
+	return readl(&fuse->security_mode);
+}
+
+static int is_failure_analysis_mode(struct fuse_regs *fuse)
+{
+	return readl(&fuse->fa);
+}
+
+static int ap20_is_odm_production_mode(void)
+{
+	struct fuse_regs *fuse = (struct fuse_regs *)TEGRA20_FUSE_BASE;
+
+	if (!is_failure_analysis_mode(fuse) &&
+	    is_odm_production_mode_fuse_set(fuse))
+		return 1;
+	else
+		return 0;
+}
+
+static int ap20_is_production_mode(void)
+{
+	struct fuse_regs *fuse = (struct fuse_regs *)TEGRA20_FUSE_BASE;
+
+	if (get_major_version() == 0)
+		return 1;
+
+	if (!is_failure_analysis_mode(fuse) &&
+	    is_production_mode_fuse_set(fuse) &&
+	    !is_odm_production_mode_fuse_set(fuse))
+		return 1;
+	else
+		return 0;
+}
+
+static enum fuse_operating_mode fuse_get_operation_mode(void)
+{
+	u32 chip_id;
+	struct apb_misc_gp_ctlr *gp =
+		(struct apb_misc_gp_ctlr *)TEGRA20_APB_MISC_GP_BASE;
+
+	chip_id = (readl(&gp->hidrev) & HIDREV_CHIPID_MASK) >>
+			HIDREV_CHIPID_SHIFT;
+	if (chip_id == CHIPID_TEGRA20) {
+		if (ap20_is_odm_production_mode()) {
+			printf("!! odm_production_mode is not supported !!\n");
+			return MODE_UNDEFINED;
+		} else
+			if (ap20_is_production_mode())
+				return MODE_PRODUCTION;
+			else
+				return MODE_UNDEFINED;
+	}
+	return MODE_UNDEFINED;
+}
+
+static void determine_crypto_options(int *is_encrypted, int *is_signed,
+				     int *use_zero_key)
+{
+	switch (fuse_get_operation_mode()) {
+	case MODE_PRODUCTION:
+		*is_encrypted = 0;
+		*is_signed = 1;
+		*use_zero_key = 1;
+		break;
+	case MODE_UNDEFINED:
+	default:
+		*is_encrypted = 0;
+		*is_signed = 0;
+		*use_zero_key  = 0;
+		break;
+	}
+}
+
+static int sign_wb_code(u32 start, u32 length, int use_zero_key)
+{
+	int err;
+	u8 *source;		/* Pointer to source */
+	u8 *hash;
+
+	/* Calculate AES block parameters. */
+	source = (u8 *)(start + offsetof(struct wb_header, random_aes_block));
+	length -= offsetof(struct wb_header, random_aes_block);
+	hash = (u8 *)(start + offsetof(struct wb_header, hash));
+	err = sign_data_block(source, length, hash);
+
+	return err;
+}
+
+int warmboot_prepare_code(u32 seg_address, u32 seg_length)
+{
+	int err = 0;
+	u32 length;			/* length of the signed/encrypt code */
+	struct wb_header *dst_header;	/* Pointer to dest WB header */
+	int is_encrypted;		/* Segment is encrypted */
+	int is_signed;			/* Segment is signed */
+	int use_zero_key;		/* Use key of all zeros */
+
+	/* Determine crypto options. */
+	determine_crypto_options(&is_encrypted, &is_signed, &use_zero_key);
+
+	/* Get the actual code limits. */
+	length = roundup(((u32)wb_end - (u32)wb_start), 16);
+
+	/*
+	 * The region specified by seg_address must be in SDRAM and must be
+	 * nonzero in length.
+	 */
+	if (seg_length == 0 || seg_address < NV_PA_SDRAM_BASE ||
+		seg_address + seg_length >= NV_PA_SDRAM_BASE + gd->ram_size) {
+		err = -EFAULT;
+		goto fail;
+	}
+
+	/* Things must be 16-byte aligned. */
+	if ((seg_length & 0xF) || (seg_address & 0xF)) {
+		err = -EINVAL;
+		goto fail;
+	}
+
+	/* Will the code fit? (destination includes wb_header + wb code) */
+	if (seg_length < (length + sizeof(struct wb_header))) {
+		err = -EINVAL;
+		goto fail;
+	}
+
+	dst_header = (struct wb_header *)seg_address;
+	memset((char *)dst_header, 0, sizeof(struct wb_header));
+
+	/* Populate the random_aes_block as requested. */
+	{
+		u32 *aes_block = (u32 *)&(dst_header->random_aes_block);
+		u32 *end = (u32 *)(((u32)aes_block) +
+				   sizeof(dst_header->random_aes_block));
+
+		do {
+			*aes_block++ = 0;
+		} while (aes_block < end);
+	}
+
+	/* Populate the header. */
+	dst_header->length_insecure = length + sizeof(struct wb_header);
+	dst_header->length_secure = length + sizeof(struct wb_header);
+	dst_header->destination = AP20_WB_RUN_ADDRESS;
+	dst_header->entry_point = AP20_WB_RUN_ADDRESS;
+	dst_header->code_length = length;
+
+	if (is_encrypted) {
+		printf("!!!! Encryption is not supported !!!!\n");
+		dst_header->length_insecure = 0;
+		err = -EACCES;
+		goto fail;
+	} else
+		/* copy the wb code directly following dst_header. */
+		memcpy((char *)(dst_header+1), (char *)wb_start, length);
+
+	if (is_signed)
+		err = sign_wb_code(seg_address, dst_header->length_insecure,
+				   use_zero_key);
+
+fail:
+	if (err)
+		printf("Warning: warmboot code copy failed (error=%d)\n", err);
+
+	return err;
+}