85xx: add ability to upload QE firmware

Define the layout of a binary blob that contains a QE firmware and instructions
on how to upload it.  Add function qe_upload_firmware() to parse the blob and
perform the actual upload.  Add command-line command "qe fw" to take a firmware
blob in memory and upload it.  Update ft_cpu_setup() on 85xx to create the
'firmware' device tree node if U-Boot has uploaded a firmware.  Fully define
'struct rsp' in immap_qe.h to include the actual RISC Special Registers.

Signed-off-by: Timur Tabi <timur@freescale.com>

common/fdt_support.c

@@ -30,6 +30,9 @@
 #include <fdt_support.h>
 #include <exports.h>
 
+#ifdef CONFIG_QE
+#include "../drivers/qe/qe.h"
+#endif
 /*
  * Global data (for the gd->bd)
  */
@@ -614,4 +617,49 @@ void fdt_fixup_ethernet(void *fdt, bd_t *bd)
 #endif
 	}
 }
+
+#ifdef CONFIG_QE
+/*
+ * If a QE firmware has been uploaded, then add the 'firmware' node under
+ * the 'qe' node.
+ */
+void fdt_fixup_qe_firmware(void *fdt)
+{
+	struct qe_firmware_info *qe_fw_info;
+	int node, ret;
+
+	qe_fw_info = qe_get_firmware_info();
+	if (!qe_fw_info)
+		return;
+
+	node = fdt_path_offset(fdt, "/qe");
+	if (node < 0)
+		return;
+
+	/* We assume the node doesn't exist yet */
+	node = fdt_add_subnode(fdt, node, "firmware");
+	if (node < 0)
+		return;
+
+	ret = fdt_setprop(fdt, node, "extended-modes",
+		&qe_fw_info->extended_modes, sizeof(u64));
+	if (ret < 0)
+		goto error;
+
+	ret = fdt_setprop_string(fdt, node, "id", qe_fw_info->id);
+	if (ret < 0)
+		goto error;
+
+	ret = fdt_setprop(fdt, node, "virtual-traps", qe_fw_info->vtraps,
+		sizeof(qe_fw_info->vtraps));
+	if (ret < 0)
+		goto error;
+
+	return;
+
+error:
+	fdt_del_node(fdt, node);
+}
+#endif
+
 #endif

cpu/mpc85xx/fdt.c

@@ -45,6 +45,7 @@ void ft_cpu_setup(void *blob, bd_t *bd)
 #ifdef CONFIG_QE
 	do_fixup_by_prop_u32(blob, "device_type", "soc", 4,
 		"bus-frequency", bd->bi_busfreq, 1);
+	fdt_fixup_qe_firmware(blob);
 #endif
 
 #ifdef CFG_NS16550

drivers/qe/qe.c

@@ -21,6 +21,7 @@
  */
 
 #include "common.h"
+#include <command.h>
 #include "asm/errno.h"
 #include "asm/io.h"
 #include "asm/immap_qe.h"
@@ -248,4 +249,222 @@ int qe_set_mii_clk_src(int ucc_num)
 	return 0;
 }
 
+/* The maximum number of RISCs we support */
+#define MAX_QE_RISC     2
+
+/* Firmware information stored here for qe_get_firmware_info() */
+static struct qe_firmware_info qe_firmware_info;
+
+/*
+ * Set to 1 if QE firmware has been uploaded, and therefore
+ * qe_firmware_info contains valid data.
+ */
+static int qe_firmware_uploaded;
+
+/*
+ * Upload a QE microcode
+ *
+ * This function is a worker function for qe_upload_firmware().  It does
+ * the actual uploading of the microcode.
+ */
+static void qe_upload_microcode(const void *base,
+	const struct qe_microcode *ucode)
+{
+	const u32 *code = base + be32_to_cpu(ucode->code_offset);
+	unsigned int i;
+
+	if (ucode->major || ucode->minor || ucode->revision)
+		printf("QE: uploading microcode '%s' version %u.%u.%u\n",
+			ucode->id, ucode->major, ucode->minor, ucode->revision);
+	else
+		printf("QE: uploading microcode '%s'\n", ucode->id);
+
+	/* Use auto-increment */
+	out_be32(&qe_immr->iram.iadd, be32_to_cpu(ucode->iram_offset) |
+		QE_IRAM_IADD_AIE | QE_IRAM_IADD_BADDR);
+
+	for (i = 0; i < be32_to_cpu(ucode->count); i++)
+		out_be32(&qe_immr->iram.idata, be32_to_cpu(code[i]));
+}
+
+/*
+ * Upload a microcode to the I-RAM at a specific address.
+ *
+ * See docs/README.qe_firmware for information on QE microcode uploading.
+ *
+ * Currently, only version 1 is supported, so the 'version' field must be
+ * set to 1.
+ *
+ * The SOC model and revision are not validated, they are only displayed for
+ * informational purposes.
+ *
+ * 'calc_size' is the calculated size, in bytes, of the firmware structure and
+ * all of the microcode structures, minus the CRC.
+ *
+ * 'length' is the size that the structure says it is, including the CRC.
+ */
+int qe_upload_firmware(const struct qe_firmware *firmware)
+{
+	unsigned int i;
+	unsigned int j;
+	u32 crc;
+	size_t calc_size = sizeof(struct qe_firmware);
+	size_t length;
+	const struct qe_header *hdr;
+
+	if (!firmware) {
+		printf("Invalid address\n");
+		return -EINVAL;
+	}
+
+	hdr = &firmware->header;
+	length = be32_to_cpu(hdr->length);
+
+	/* Check the magic */
+	if ((hdr->magic[0] != 'Q') || (hdr->magic[1] != 'E') ||
+	    (hdr->magic[2] != 'F')) {
+		printf("Not a microcode\n");
+		return -EPERM;
+	}
+
+	/* Check the version */
+	if (hdr->version != 1) {
+		printf("Unsupported version\n");
+		return -EPERM;
+	}
+
+	/* Validate some of the fields */
+	if ((firmware->count < 1) || (firmware->count >= MAX_QE_RISC)) {
+		printf("Invalid data\n");
+		return -EINVAL;
+	}
+
+	/* Validate the length and check if there's a CRC */
+	calc_size += (firmware->count - 1) * sizeof(struct qe_microcode);
+
+	for (i = 0; i < firmware->count; i++)
+		/*
+		 * For situations where the second RISC uses the same microcode
+		 * as the first, the 'code_offset' and 'count' fields will be
+		 * zero, so it's okay to add those.
+		 */
+		calc_size += sizeof(u32) *
+			be32_to_cpu(firmware->microcode[i].count);
+
+	/* Validate the length */
+	if (length != calc_size + sizeof(u32)) {
+		printf("Invalid length\n");
+		return -EPERM;
+	}
+
+        /*
+         * Validate the CRC.  We would normally call crc32_no_comp(), but that
+         * function isn't available unless you turn on JFFS support.
+         */
+	crc = be32_to_cpu(*(u32 *)((void *)firmware + calc_size));
+	if (crc != (crc32(-1, (const void *) firmware, calc_size) ^ -1)) {
+		printf("Firmware CRC is invalid\n");
+		return -EIO;
+	}
+
+	/*
+	 * If the microcode calls for it, split the I-RAM.
+	 */
+	if (!firmware->split) {
+		out_be16(&qe_immr->cp.cercr,
+			in_be16(&qe_immr->cp.cercr) | QE_CP_CERCR_CIR);
+	}
+
+	if (firmware->soc.model)
+		printf("Firmware '%s' for %u V%u.%u\n",
+			firmware->id, be16_to_cpu(firmware->soc.model),
+			firmware->soc.major, firmware->soc.minor);
+	else
+		printf("Firmware '%s'\n", firmware->id);
+
+	/*
+	 * The QE only supports one microcode per RISC, so clear out all the
+	 * saved microcode information and put in the new.
+	 */
+	memset(&qe_firmware_info, 0, sizeof(qe_firmware_info));
+	strcpy(qe_firmware_info.id, firmware->id);
+	qe_firmware_info.extended_modes = firmware->extended_modes;
+	memcpy(qe_firmware_info.vtraps, firmware->vtraps,
+		sizeof(firmware->vtraps));
+	qe_firmware_uploaded = 1;
+
+	/* Loop through each microcode. */
+	for (i = 0; i < firmware->count; i++) {
+		const struct qe_microcode *ucode = &firmware->microcode[i];
+
+		/* Upload a microcode if it's present */
+		if (ucode->code_offset)
+			qe_upload_microcode(firmware, ucode);
+
+		/* Program the traps for this processor */
+		for (j = 0; j < 16; j++) {
+			u32 trap = be32_to_cpu(ucode->traps[j]);
+
+			if (trap)
+				out_be32(&qe_immr->rsp[i].tibcr[j], trap);
+		}
+
+		/* Enable traps */
+		out_be32(&qe_immr->rsp[i].eccr, be32_to_cpu(ucode->eccr));
+	}
+
+	return 0;
+}
+
+struct qe_firmware_info *qe_get_firmware_info(void)
+{
+	return qe_firmware_uploaded ? &qe_firmware_info : NULL;
+}
+
+static int qe_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	ulong addr;
+
+	if (argc < 3) {
+		printf ("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	if (strcmp(argv[1], "fw") == 0) {
+		addr = simple_strtoul(argv[2], NULL, 16);
+
+		if (!addr) {
+			printf("Invalid address\n");
+			return -EINVAL;
+		}
+
+                /*
+                 * If a length was supplied, compare that with the 'length'
+                 * field.
+                 */
+
+		if (argc > 3) {
+			ulong length = simple_strtoul(argv[3], NULL, 16);
+			struct qe_firmware *firmware = (void *) addr;
+
+			if (length != be32_to_cpu(firmware->header.length)) {
+				printf("Length mismatch\n");
+				return -EINVAL;
+			}
+		}
+
+		return qe_upload_firmware((const struct qe_firmware *) addr);
+	}
+
+	printf ("Usage:\n%s\n", cmdtp->usage);
+	return 1;
+}
+
+U_BOOT_CMD(
+	qe, 4, 0, qe_cmd,
+	"qe      - QUICC Engine commands\n",
+	"fw <addr> [<length>] - Upload firmware binary at address <addr> to "
+		"the QE,\n\twith optional length <length> verification.\n"
+	);
+
 #endif /* CONFIG_QE */

drivers/qe/qe.h

@@ -222,6 +222,60 @@ typedef enum qe_clock {
 
 #define QE_SDEBCR_BA_MASK		0x01FFFFFF
 
+/* Communication Processor */
+#define QE_CP_CERCR_MEE		0x8000	/* Multi-user RAM ECC enable */
+#define QE_CP_CERCR_IEE		0x4000	/* Instruction RAM ECC enable */
+#define QE_CP_CERCR_CIR		0x0800	/* Common instruction RAM */
+
+/* I-RAM */
+#define QE_IRAM_IADD_AIE	0x80000000	/* Auto Increment Enable */
+#define QE_IRAM_IADD_BADDR	0x00080000	/* Base Address */
+
+/* Structure that defines QE firmware binary files.
+ *
+ * See doc/README.qe_firmware for a description of these fields.
+ */
+struct qe_firmware {
+	struct qe_header {
+		u32 length;  /* Length of the entire structure, in bytes */
+		u8 magic[3];    /* Set to { 'Q', 'E', 'F' } */
+		u8 version;     /* Version of this layout. First ver is '1' */
+	} header;
+	u8 id[62];      /* Null-terminated identifier string */
+	u8 split;	/* 0 = shared I-RAM, 1 = split I-RAM */
+	u8 count;       /* Number of microcode[] structures */
+	struct {
+		u16 model;   	/* The SOC model  */
+		u8 major;       	/* The SOC revision major */
+		u8 minor;       	/* The SOC revision minor */
+	} __attribute__ ((packed)) soc;
+	u8 padding[4];			/* Reserved, for alignment */
+	u64 extended_modes;		/* Extended modes */
+	u32 vtraps[8];		/* Virtual trap addresses */
+	u8 reserved[4];			/* Reserved, for future expansion */
+	struct qe_microcode {
+		u8 id[32];      	/* Null-terminated identifier */
+		u32 traps[16];       /* Trap addresses, 0 == ignore */
+		u32 eccr;    	/* The value for the ECCR register */
+		u32 iram_offset;     /* Offset into I-RAM for the code */
+		u32 count;   	/* Number of 32-bit words of the code */
+		u32 code_offset;     /* Offset of the actual microcode */
+		u8 major;       	/* The microcode version major */
+		u8 minor;       	/* The microcode version minor */
+		u8 revision;		/* The microcode version revision */
+		u8 padding;		/* Reserved, for alignment */
+		u8 reserved[4];		/* Reserved, for future expansion */
+	} __attribute__ ((packed)) microcode[1];
+	/* All microcode binaries should be located here */
+	/* CRC32 should be located here, after the microcode binaries */
+} __attribute__ ((packed));
+
+struct qe_firmware_info {
+	char id[64];		/* Firmware name */
+	u32 vtraps[8];		/* Virtual trap addresses */
+	u64 extended_modes;	/* Extended modes */
+};
+
 void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign);
 void qe_issue_cmd(uint cmd, uint sbc, u8 mcn, u32 cmd_data);
 uint qe_muram_alloc(uint size, uint align);
@@ -233,5 +287,7 @@ void qe_reset(void);
 void qe_assign_page(uint snum, uint para_ram_base);
 int qe_set_brg(uint brg, uint rate);
 int qe_set_mii_clk_src(int ucc_num);
+int qe_upload_firmware(const struct qe_firmware *firmware);
+struct qe_firmware_info *qe_get_firmware_info(void);
 
 #endif /* __QE_H__ */

include/asm-ppc/immap_qe.h

@@ -513,10 +513,39 @@ typedef struct dbg {
 	u8 res2[0x48];
 } __attribute__ ((packed)) dbg_t;
 
-/* RISC Special Registers (Trap and Breakpoint)
+/*
+ * RISC Special Registers (Trap and Breakpoint).  These are described in
+ * the QE Developer's Handbook.
 */
 typedef struct rsp {
-	u8 fixme[0x100];
+	u32 tibcr[16];	/* Trap/instruction breakpoint control regs */
+	u8 res0[64];
+	u32 ibcr0;
+	u32 ibs0;
+	u32 ibcnr0;
+	u8 res1[4];
+	u32 ibcr1;
+	u32 ibs1;
+	u32 ibcnr1;
+	u32 npcr;
+	u32 dbcr;
+	u32 dbar;
+	u32 dbamr;
+	u32 dbsr;
+	u32 dbcnr;
+	u8 res2[12];
+	u32 dbdr_h;
+	u32 dbdr_l;
+	u32 dbdmr_h;
+	u32 dbdmr_l;
+	u32 bsr;
+	u32 bor;
+	u32 bior;
+	u8 res3[4];
+	u32 iatr[4];
+	u32 eccr;		/* Exception control configuration register */
+	u32 eicr;
+	u8 res4[0x100-0xf8];
 } __attribute__ ((packed)) rsp_t;
 
 typedef struct qe_immap {

include/fdt_support.h

@@ -48,6 +48,7 @@ int fdt_fixup_memory(void *blob, u64 start, u64 size);
 void fdt_fixup_ethernet(void *fdt, bd_t *bd);
 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
 			 const void *val, int len, int create);
+void fdt_fixup_qe_firmware(void *fdt);
 
 #ifdef CONFIG_OF_HAS_UBOOT_ENV
 int fdt_env(void *fdt);