[package] Add uboot for xburst package

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20832 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 880 insertions, 0 deletions

diff --git a/package/uboot-xburst/files/cpu/mips/usb_boot.S b/package/uboot-xburst/files/cpu/mips/usb_boot.S
new file mode 100644
index 0000000000..107b928c71
--- /dev/null
+++ b/package/uboot-xburst/files/cpu/mips/usb_boot.S
@@ -0,0 +1,880 @@
+/*
+ *  for jz4740 usb boot
+ *
+ *  Copyright (c) 2009	Xiangfu Liu <xiangfu.z@gmail.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
+ */
+    .set noreorder
+    .globl usb_boot
+    .text
+
+//----------------------------------------------------------------------
+// Both NAND and USB boot load data to D-Cache first, then transfer
+// data from D-Cache to I-Cache, and jump to execute the code in I-Cache.
+// So init caches first and then dispatch to a proper boot routine.
+//----------------------------------------------------------------------
+
+.macro load_addr reg addr
+	li \reg, 0x80000000
+	addiu \reg, \reg, \addr
+	la $2, usbboot_begin
+	subu \reg, \reg, $2
+.endm
+
+usb_boot:
+	//--------------------------------------------------------------
+	// Initialize PLL: set ICLK to 84MHz and HCLK to 42MHz.
+	//--------------------------------------------------------------
+	la	$9, 0xB0000000		// CPCCR: Clock Control Register
+	la	$8, 0x42041110		// I:S:M:P=1:2:2:2
+	sw	$8, 0($9)
+
+	la	$9, 0xB0000010		// CPPCR: PLL Control Register
+	la	$8, 0x06000120		// M=12 N=0 D=0 CLK=12*(M+2)/(N+2)
+	sw	$8, 0($9)
+
+	mtc0	$0, $26			// CP0_ERRCTL, restore WST reset state
+	nop
+
+	mtc0	$0, $16			// CP0_CONFIG
+	nop
+
+	// Relocate code to beginning of the ram
+
+	la $2, usbboot_begin
+	la $3, usbboot_end
+	li $4, 0x80000000
+
+1:
+	lw $5, 0($2)
+	sw $5, 0($4)
+	addiu $2, $2, 4
+	bne $2, $3, 1b
+	addiu $4, $4, 4
+
+	li $2, 0x80000000
+	ori $3, $2, 0
+	addiu $3, $3, usbboot_end
+	la $4, usbboot_begin
+	subu $3, $3, $4
+
+
+2:
+	cache	0x0, 0($2)		// Index_Invalidate_I
+	cache	0x1, 0($2)		// Index_Writeback_Inv_D
+	addiu	$2, $2, 32
+	subu $4, $3, $2
+	bgtz	$4, 2b
+	nop
+
+	load_addr $3, usb_boot_return
+
+	jr $3
+
+usbboot_begin:
+
+init_caches:
+	li	$2, 3			// cacheable for kseg0 access
+	mtc0	$2, $16			// CP0_CONFIG
+	nop
+
+	li	$2, 0x20000000		// enable idx-store-data cache insn
+	mtc0	$2, $26			// CP0_ERRCTL
+
+	ori	$2, $28, 0		// start address
+	ori	$3, $2, 0x3fe0		// end address, total 16KB
+	mtc0	$0, $28, 0		// CP0_TAGLO
+	mtc0	$0, $28, 1		// CP0_DATALO
+cache_clear_a_line:
+	cache	0x8, 0($2)		// Index_Store_Tag_I
+	cache	0x9, 0($2)		// Index_Store_Tag_D
+	bne	$2, $3, cache_clear_a_line
+	addiu	$2, $2, 32		// increment CACHE_LINE_SIZE
+
+	ori	$2, $28, 0		// start address
+	ori	$3, $2, 0x3fe0		// end address, total 16KB
+	la	$4, 0x1ffff000		// physical address and 4KB page mask
+cache_alloc_a_line:
+	and	$5, $2, $4
+	ori	$5, $5, 1		// V bit of the physical tag
+	mtc0	$5, $28, 0		// CP0_TAGLO
+	cache	0x8, 0($2)		// Index_Store_Tag_I
+	cache	0x9, 0($2)		// Index_Store_Tag_D
+	bne	$2, $3, cache_alloc_a_line
+	addiu	$2, $2, 32		// increment CACHE_LINE_SIZE
+
+	nop
+	nop
+	nop
+	//--------------------------------------------------------------
+	// Transfer data from dcache to icache, then jump to icache.
+	//
+	// Input parameters:
+	//
+	// $19: data length in bytes
+	// $20: jump target address
+	//--------------------------------------------------------------
+xfer_d2i:
+
+	ori	$8, $20, 0
+	addu	$9, $8, $19		// total 16KB
+
+1:
+	cache	0x0, 0($8)		// Index_Invalidate_I
+	cache	0x1, 0($8)		// Index_Writeback_Inv_D
+	bne	$8, $9, 1b
+	addiu	$8, $8, 32
+
+	// flush write-buffer
+	sync
+
+	// Invalidate BTB
+	mfc0	$8, $16, 7		// CP0_CONFIG
+	nop
+	ori	$8, 2
+	mtc0	$8, $16, 7
+	nop
+
+	// Overwrite config to disable ram initalisation
+	li $2, 0xff
+	sb $2, 20($20)
+
+	jalr	$20
+	nop
+
+icache_return:
+	//--------------------------------------------------------------
+	// User code can return to here after executing itself in 
+	// icache, by jumping to $31.
+	//--------------------------------------------------------------
+	b	usb_boot_return
+	nop
+
+
+usb_boot_return:
+	//--------------------------------------------------------------
+	// Enable the USB PHY
+	//--------------------------------------------------------------
+	la	$9, 0xB0000024		// CPM_SCR
+	lw	$8, 0($9)
+	ori	$8, 0x40		// USBPHY_ENABLE
+	sw	$8, 0($9)
+
+	//--------------------------------------------------------------
+	// Initialize USB registers
+	//--------------------------------------------------------------
+	la	$27, 0xb3040000		// USB registers base address
+
+	sb	$0, 0x0b($27)		// INTRUSBE: disable common USB interrupts
+	sh	$0, 0x06($27)		// INTRINE: disable EPIN interrutps
+	sh	$0, 0x08($27)		// INTROUTE: disable EPOUT interrutps
+
+	li	$9, 0x61
+	sb	$9, 0x01($27)		// POWER: HSENAB | SUSPENDM | SOFTCONN
+
+	//--------------------------------------------------------------
+	// Initialize USB states
+	//--------------------------------------------------------------
+	li	$22, 0			// set EP0 to IDLE state
+	li	$23, 1			// no data stage
+
+	//--------------------------------------------------------------
+	// Main loop of polling the usb commands
+	//--------------------------------------------------------------
+usb_command_loop:
+	lbu	$9, 0x0a($27)		// read INTRUSB
+	andi	$9, 0x04		// check USB_INTR_RESET
+	beqz	$9, check_intr_ep0in
+	nop
+
+	//--------------------------------------------------------------
+ 	// 1. Handle USB reset interrupt
+	//--------------------------------------------------------------
+handle_reset_intr:
+	lbu	$9, 0x01($27)		// read POWER
+	andi	$9, 0x10		// test HS_MODE
+	bnez	$9, _usb_set_maxpktsize
+	li	$9, 512			// max packet size of HS mode
+	li	$9, 64			// max packet size of FS mode
+
+_usb_set_maxpktsize:
+	li	$8, 1
+	sb	$8, 0x0e($27)		// set INDEX 1
+
+	sh	$9, 0x10($27)		// INMAXP
+	sb	$0, 0x13($27)		// INCSRH
+	sh	$9, 0x14($27)		// OUTMAXP
+	sb	$0, 0x17($27)		// OUTCSRH
+
+_usb_flush_fifo:
+	li	$8, 0x48		// INCSR_CDT && INCSR_FF
+	sb	$8, 0x12($27)		// INCSR
+	li	$8, 0x90		// OUTCSR_CDT && OUTCSR_FF
+	sb	$8, 0x16($27)		// OUTCSR
+
+	li	$22, 0			// set EP0 to IDLE state
+	li	$23, 1			// no data stage
+
+	//--------------------------------------------------------------
+	// 2. Check and handle EP0 interrupt
+	//--------------------------------------------------------------
+check_intr_ep0in:
+	lhu	$10, 0x02($27)		// read INTRIN
+	andi	$9, $10, 0x1		// check EP0 interrupt
+	beqz	$9, check_intr_ep1in
+	nop
+
+handle_ep0_intr:
+	sb	$0, 0x0e($27)		// set INDEX 0
+	lbu	$11, 0x12($27)		// read CSR0
+
+	andi	$9, $11, 0x04		// check SENTSTALL
+	beqz	$9, _ep0_setupend
+	nop
+
+_ep0_sentstall:
+	andi	$9, $11, 0xdb
+	sb	$9, 0x12($27)		// clear SENDSTALL and SENTSTALL
+	li	$22, 0			// set EP0 to IDLE state
+
+_ep0_setupend:
+	andi	$9, $11, 0x10		// check SETUPEND
+	beqz	$9, ep0_idle_state
+	nop
+
+	ori	$9, $11, 0x80
+	sb	$9, 0x12($27)		// set SVDSETUPEND
+	li	$22, 0			// set EP0 to IDLE state
+
+ep0_idle_state:
+	bnez	$22, ep0_tx_state
+	nop
+
+	//--------------------------------------------------------------
+	// 2.1 Handle EP0 IDLE state interrupt
+	//--------------------------------------------------------------
+	andi	$9, $11, 0x01		// check OUTPKTRDY
+	beqz	$9, check_intr_ep1in
+	nop
+
+	//--------------------------------------------------------------
+	// Read 8-bytes setup packet from the FIFO
+	//--------------------------------------------------------------
+	lw	$25, 0x20($27)		// first word of setup packet
+	lw	$26, 0x20($27)		// second word of setup packet
+
+	andi	$9, $25, 0x60		// bRequestType & USB_TYPE_MASK
+	beqz	$9, _ep0_std_req
+	nop
+
+	//--------------------------------------------------------------
+	// 2.1.1 Vendor-specific setup request
+	//--------------------------------------------------------------
+_ep0_vend_req:
+	li	$22, 0			// set EP0 to IDLE state
+	li	$23, 1			// NoData = 1
+
+	andi	$9, $25, 0xff00		// check bRequest
+	srl	$9, $9, 8
+	beqz	$9, __ep0_get_cpu_info
+	sub	$8, $9, 0x1
+	beqz	$8, __ep0_set_data_address
+	sub	$8, $9, 0x2
+	beqz	$8, __ep0_set_data_length
+	sub	$8, $9, 0x3
+	beqz	$8, __ep0_flush_caches
+	sub	$8, $9, 0x4
+	beqz	$8, __ep0_prog_start1
+	sub	$8, $9, 0x5
+	beqz	$8, __ep0_prog_start2
+	nop
+	b	_ep0_idle_state_fini	// invalid request
+	nop
+
+__ep0_get_cpu_info:
+	load_addr $20, cpu_info_data	// data pointer to transfer
+	li	$21, 8			// bytes left to transfer
+	li	$22, 1			// set EP0 to TX state
+	li	$23, 0			// NoData = 0
+
+	b	_ep0_idle_state_fini
+	nop
+
+__ep0_set_data_address:
+	li	$9, 0xffff0000
+	and	$9, $25, $9
+	andi	$8, $26, 0xffff
+	or	$20, $9, $8		// data address of next transfer
+
+	b	_ep0_idle_state_fini
+	nop
+
+__ep0_set_data_length:
+	li	$9, 0xffff0000
+	and	$9, $25, $9
+	andi	$8, $26, 0xffff
+	or	$21, $9, $8		// data length of next transfer
+
+	li	$9, 0x48		// SVDOUTPKTRDY and DATAEND
+	sb	$9, 0x12($27)		// CSR0
+
+	// We must write packet to FIFO before EP1-IN interrupt here.
+	b	handle_epin1_intr
+	nop
+
+__ep0_flush_caches:
+	// Flush dcache and invalidate icache.
+	li	$8, 0x80000000
+	addi	$9, $8, 0x3fe0		// total 16KB
+
+1:
+	cache	0x0, 0($8)		// Index_Invalidate_I
+	cache	0x1, 0($8)		// Index_Writeback_Inv_D
+	bne	$8, $9, 1b
+	addiu	$8, $8, 32
+
+	// flush write-buffer
+	sync
+
+	// Invalidate BTB
+	mfc0	$8, $16, 7		// CP0_CONFIG
+	nop
+	ori	$8, 2
+	mtc0	$8, $16, 7
+	nop
+
+	b	_ep0_idle_state_fini
+	nop
+
+__ep0_prog_start1:
+	li	$9, 0x48		// SVDOUTPKTRDY and DATAEND
+	sb	$9, 0x12($27)		// CSR0
+
+	li	$9, 0xffff0000
+	and	$9, $25, $9
+	andi	$8, $26, 0xffff
+	or	$20, $9, $8		// target address
+
+	b	xfer_d2i
+	li	$19, 0x2000		// 16KB data length
+
+__ep0_prog_start2:
+	li	$9, 0x48		// SVDOUTPKTRDY and DATAEND
+	sb	$9, 0x12($27)		// CSR0
+
+	li	$9, 0xffff0000
+	and	$9, $25, $9
+	andi	$8, $26, 0xffff
+	or	$20, $9, $8		// target address
+
+	jalr	$20			// jump, and place the return address in $31
+	nop
+
+__ep0_prog_start2_return:
+	// User code can return to here after executing itself, by jumping to $31.
+	b	usb_boot_return
+	nop
+
+	//--------------------------------------------------------------
+	// 2.1.2 Standard setup request
+	//--------------------------------------------------------------
+_ep0_std_req:
+	andi	$12, $25, 0xff00	// check bRequest
+	srl	$12, $12, 8
+	sub	$9, $12, 0x05		// check USB_REQ_SET_ADDRESS
+	bnez	$9, __ep0_req_set_config
+	nop
+
+	//--------------------------------------------------------------
+	// Handle USB_REQ_SET_ADDRESS
+	//--------------------------------------------------------------
+__ep0_req_set_addr:
+	srl	$9, $25, 16		// get wValue
+	sb	$9, 0x0($27)		// set FADDR
+	li	$23, 1			// NoData = 1
+	b	_ep0_idle_state_fini
+	nop
+
+__ep0_req_set_config:
+	sub	$9, $12, 0x09		// check USB_REQ_SET_CONFIGURATION
+	bnez	$9, __ep0_req_get_desc
+	nop
+
+	//--------------------------------------------------------------
+	// Handle USB_REQ_SET_CONFIGURATION
+	//--------------------------------------------------------------
+	li	$23, 1			// NoData = 1
+	b	_ep0_idle_state_fini
+	nop
+
+__ep0_req_get_desc:
+	sub	$9, $12, 0x06		// check USB_REQ_GET_DESCRIPTOR
+	bnez	$9, _ep0_idle_state_fini
+	li	$23, 1			// NoData = 1
+
+	//--------------------------------------------------------------
+	// Handle USB_REQ_GET_DESCRIPTOR
+	//--------------------------------------------------------------
+	li	$23, 0			// NoData = 0
+
+	srl	$9, $25, 24		// wValue >> 8
+	sub	$8, $9, 0x01		// check USB_DT_DEVICE
+	beqz	$8, ___ep0_get_dev_desc
+	srl	$21, $26, 16		// get wLength
+	sub	$8, $9, 0x02		// check USB_DT_CONFIG
+	beqz	$8, ___ep0_get_conf_desc
+	sub	$8, $9, 0x03		// check USB_DT_STRING
+	beqz	$8, ___ep0_get_string_desc
+	sub	$8, $9, 0x06		// check USB_DT_DEVICE_QUALIFIER
+	beqz	$8, ___ep0_get_dev_qualifier
+	nop
+	b	_ep0_idle_state_fini
+	nop
+
+___ep0_get_dev_desc:
+	load_addr	$20, device_desc	// data pointer
+	li	$22, 1			// set EP0 to TX state
+	sub	$8, $21, 18
+	blez	$8, _ep0_idle_state_fini // wLength <= 18
+	nop
+	li	$21, 18			// max length of device_desc
+	b	_ep0_idle_state_fini
+	nop
+
+___ep0_get_dev_qualifier:
+	load_addr	$20, dev_qualifier	// data pointer
+	li	$22, 1			// set EP0 to TX state
+	sub	$8, $21, 10
+	blez	$8, _ep0_idle_state_fini // wLength <= 10
+	nop
+	li	$21, 10			// max length of dev_qualifier
+	b	_ep0_idle_state_fini
+	nop
+
+___ep0_get_conf_desc:
+	load_addr	$20, config_desc_fs	// data pointer of FS mode
+	lbu	$8, 0x01($27)		// read POWER
+	andi	$8, 0x10		// test HS_MODE
+	beqz	$8, ___ep0_get_conf_desc2
+	nop
+	load_addr $20, config_desc_hs	// data pointer of HS mode
+
+___ep0_get_conf_desc2:
+	li	$22, 1			// set EP0 to TX state
+	sub	$8, $21, 32
+	blez	$8, _ep0_idle_state_fini // wLength <= 32
+	nop
+	li	$21, 32			// max length of config_desc
+	b	_ep0_idle_state_fini
+	nop
+
+___ep0_get_string_desc:
+	li	$22, 1			// set EP0 to TX state
+
+	srl	$9, $25, 16		// wValue & 0xff
+	andi	$9, 0xff
+
+	sub	$8, $9, 1
+	beqz	$8, ___ep0_get_string_manufacture
+	sub	$8, $9, 2
+	beqz	$8, ___ep0_get_string_product
+	nop
+
+___ep0_get_string_lang_ids:
+	load_addr	$20, string_lang_ids	// data pointer
+	b	_ep0_idle_state_fini
+	li	$21, 4			// data length
+
+___ep0_get_string_manufacture:
+	load_addr	$20, string_manufacture	// data pointer
+	b	_ep0_idle_state_fini
+	li	$21, 16			// data length
+
+___ep0_get_string_product:
+	load_addr	$20, string_product	// data pointer
+	b	_ep0_idle_state_fini
+	li	$21, 46			// data length
+
+_ep0_idle_state_fini:
+	li	$9, 0x40		// SVDOUTPKTRDY
+	beqz	$23, _ep0_idle_state_fini2
+	nop
+	ori	$9, $9, 0x08		// DATAEND
+_ep0_idle_state_fini2:
+	sb	$9, 0x12($27)		// CSR0
+	beqz	$22, check_intr_ep1in
+	nop
+
+	//--------------------------------------------------------------
+	// 2.2 Handle EP0 TX state interrupt
+	//--------------------------------------------------------------
+ep0_tx_state:
+	sub	$9, $22, 1
+	bnez	$9, check_intr_ep1in
+	nop
+
+	sub	$9, $21, 64		// max packetsize
+	blez	$9, _ep0_tx_state2	// data count <= 64
+	ori	$19, $21, 0
+	li	$19, 64
+
+_ep0_tx_state2:
+	beqz	$19, _ep0_tx_state3	// send ZLP
+	ori	$18, $19, 0		// record bytes to be transferred
+	sub	$21, $21, $19		// decrement data count
+
+_ep0_fifo_write_loop:
+	lbu	$9, 0($20)		// read data
+	sb	$9, 0x20($27)		// load FIFO
+	sub	$19, $19, 1		// decrement counter
+	bnez	$19, _ep0_fifo_write_loop
+	addi	$20, $20, 1		// increment data pointer
+
+	sub	$9, $18, 64		// max packetsize
+	beqz	$9, _ep0_tx_state4
+	nop
+
+_ep0_tx_state3:
+	// transferred bytes < max packetsize
+	li	$9, 0x0a		// set INPKTRDY and DATAEND
+	sb	$9, 0x12($27)		// CSR0
+	li	$22, 0			// set EP0 to IDLE state
+	b	check_intr_ep1in
+	nop
+
+_ep0_tx_state4:
+	// transferred bytes == max packetsize
+	li	$9, 0x02		// set INPKTRDY
+	sb	$9, 0x12($27)		// CSR0
+	b	check_intr_ep1in
+	nop
+
+	//--------------------------------------------------------------
+	// 3. Check and handle EP1 BULK-IN interrupt
+	//--------------------------------------------------------------
+check_intr_ep1in:
+	andi	$9, $10, 0x2		// check EP1 IN interrupt
+	beqz	$9, check_intr_ep1out
+	nop
+
+handle_epin1_intr:
+	li	$9, 1
+	sb	$9, 0x0e($27)		// set INDEX 1
+	lbu	$9, 0x12($27)		// read INCSR
+
+	andi	$8, $9, 0x2		// check INCSR_FFNOTEMPT
+	bnez	$8, _epin1_tx_state4
+	nop
+
+_epin1_write_fifo:
+	lhu	$9, 0x10($27)		// get INMAXP
+	sub	$8, $21, $9
+	blez	$8, _epin1_tx_state1	// bytes left <= INMAXP
+	ori	$19, $21, 0
+	ori	$19, $9, 0
+
+_epin1_tx_state1:
+	beqz	$19, _epin1_tx_state4	// No data
+	nop
+
+	sub	$21, $21, $19		// decrement data count
+
+	srl	$5, $19, 2		// # of word
+	andi	$6, $19, 0x3		// # of byte
+	beqz	$5, _epin1_tx_state2
+	nop
+
+_epin1_fifo_write_word:
+	lw	$9, 0($20)		// read data from source address
+	sw	$9, 0x24($27)		// write FIFO
+	sub	$5, $5, 1		// decrement counter
+	bnez	$5, _epin1_fifo_write_word
+	addiu	$20, $20, 4		// increment dest address
+
+_epin1_tx_state2:
+	beqz	$6, _epin1_tx_state3
+	nop
+
+_epin1_fifo_write_byte:
+	lbu	$9, 0($20)		// read data from source address
+	sb	$9, 0x24($27)		// write FIFO
+	sub	$6, $6, 1		// decrement counter
+	bnez	$6, _epin1_fifo_write_byte
+	addiu	$20, $20, 1		// increment dest address
+
+_epin1_tx_state3:
+	li	$9, 0x1
+	sb	$9, 0x12($27)		// INCSR, set INPKTRDY
+
+_epin1_tx_state4:
+	// nop
+
+	//--------------------------------------------------------------
+	// 4. Check and handle EP1 BULK-OUT interrupt
+	//--------------------------------------------------------------
+check_intr_ep1out:
+	lhu	$9, 0x04($27)		// read INTROUT
+	andi	$9, 0x2
+	beqz	$9, check_status_next
+	nop
+
+handle_epout1_intr:
+	li	$9, 1
+	sb	$9, 0x0e($27)		// set INDEX 1
+
+	lbu	$9, 0x16($27)		// read OUTCSR
+	andi	$9, 0x1			// check OUTPKTRDY
+	beqz	$9, check_status_next
+	nop
+
+_epout1_read_fifo:
+	lhu	$19, 0x18($27)		// read OUTCOUNT
+	srl	$5, $19, 2		// # of word
+	andi	$6, $19, 0x3		// # of byte
+	beqz	$5, _epout1_rx_state1
+	nop
+
+_epout1_fifo_read_word:
+	lw	$9, 0x24($27)		// read FIFO
+	sw	$9, 0($20)		// store to dest address
+	sub	$5, $5, 1		// decrement counter
+	bnez	$5, _epout1_fifo_read_word
+	addiu	$20, $20, 4		// increment dest address
+
+_epout1_rx_state1:
+	beqz	$6, _epout1_rx_state2
+	nop
+
+_epout1_fifo_read_byte:
+	lbu	$9, 0x24($27)		// read FIFO
+	sb	$9, 0($20)		// store to dest address
+	sub	$6, $6, 1		// decrement counter
+	bnez	$6, _epout1_fifo_read_byte
+	addiu	$20, $20, 1		// increment dest address
+
+_epout1_rx_state2:
+	sb	$0, 0x16($27)		// clear OUTPKTRDY
+
+check_status_next:
+	b	usb_command_loop
+	nop
+
+//--------------------------------------------------------------
+// Device/Configuration/Interface/Endpoint/String Descriptors
+//--------------------------------------------------------------
+
+	.align	2
+device_desc:
+	.byte	0x12		// bLength
+	.byte	0x01		// bDescriptorType
+	.byte	0x00		// bcdUSB
+	.byte	0x02		// bcdUSB
+	.byte	0x00		// bDeviceClass
+	.byte	0x00		// bDeviceSubClass
+	.byte	0x00		// bDeviceProtocol
+	.byte	0x40		// bMaxPacketSize0
+	.byte	0x1a		// idVendor
+	.byte	0x60		// idVendor
+	.byte	0x40		// idProduct
+	.byte	0x47		// idProduct
+	.byte	0x00		// bcdDevice
+	.byte	0x01		// bcdDevice
+	.byte	0x01		// iManufacturer
+	.byte	0x02		// iProduct
+	.byte	0x00		// iSerialNumber
+	.byte	0x01		// bNumConfigurations
+
+	.align	2
+dev_qualifier:
+	.byte	0x0a		// bLength
+	.byte	0x06		// bDescriptorType
+	.byte	0x00		// bcdUSB
+	.byte	0x02		// bcdUSB
+	.byte	0x00		// bDeviceClass
+	.byte	0x00		// bDeviceSubClass
+	.byte	0x00		// bDeviceProtocol
+	.byte	0x40		// bMaxPacketSize0
+	.byte	0x01		// bNumConfigurations
+	.byte	0x00		// bRESERVED
+
+	.align	2
+config_desc_hs:
+	.byte	0x09		// bLength
+	.byte	0x02		// bDescriptorType
+	.byte	0x20		// wTotalLength
+	.byte	0x00		// wTotalLength
+	.byte	0x01		// bNumInterfaces
+	.byte	0x01		// bConfigurationValue
+	.byte	0x00		// iConfiguration
+	.byte	0xc0		// bmAttributes
+	.byte	0x01		// MaxPower
+intf_desc_hs:
+	.byte	0x09		// bLength
+	.byte	0x04		// bDescriptorType
+	.byte	0x00		// bInterfaceNumber
+	.byte	0x00		// bAlternateSetting
+	.byte	0x02		// bNumEndpoints
+	.byte	0xff		// bInterfaceClass
+	.byte	0x00		// bInterfaceSubClass
+	.byte	0x50		// bInterfaceProtocol
+	.byte	0x00		// iInterface
+ep1_desc_hs:
+	.byte	0x07		// bLength
+	.byte	0x05		// bDescriptorType
+	.byte	0x01		// bEndpointAddress
+	.byte	0x02		// bmAttributes
+	.byte	0x00		// wMaxPacketSize
+	.byte	0x02		// wMaxPacketSize
+	.byte	0x00		// bInterval
+ep2_desc_hs:
+	.byte	0x07		// bLength
+	.byte	0x05		// bDescriptorType
+	.byte	0x81		// bEndpointAddress
+	.byte	0x02		// bmAttributes
+	.byte	0x00		// wMaxPacketSize
+	.byte	0x02		// wMaxPacketSize
+	.byte	0x00		// bInterval
+
+	.align	2
+config_desc_fs:
+	.byte	0x09		// bLength
+	.byte	0x02		// bDescriptorType
+	.byte	0x20		// wTotalLength
+	.byte	0x00		// wTotalLength
+	.byte	0x01		// bNumInterfaces
+	.byte	0x01		// bConfigurationValue
+	.byte	0x00		// iConfiguration
+	.byte	0xc0		// bmAttributes
+	.byte	0x01		// MaxPower
+intf_desc_fs:
+	.byte	0x09		// bLength
+	.byte	0x04		// bDescriptorType
+	.byte	0x00		// bInterfaceNumber
+	.byte	0x00		// bAlternateSetting
+	.byte	0x02		// bNumEndpoints
+	.byte	0xff		// bInterfaceClass
+	.byte	0x00		// bInterfaceSubClass
+	.byte	0x50		// bInterfaceProtocol
+	.byte	0x00		// iInterface
+ep1_desc_fs:
+	.byte	0x07		// bLength
+	.byte	0x05		// bDescriptorType
+	.byte	0x01		// bEndpointAddress
+	.byte	0x02		// bmAttributes
+	.byte	0x40		// wMaxPacketSize
+	.byte	0x00		// wMaxPacketSize
+	.byte	0x00		// bInterval
+ep2_desc_fs:
+	.byte	0x07		// bLength
+	.byte	0x05		// bDescriptorType
+	.byte	0x81		// bEndpointAddress
+	.byte	0x02		// bmAttributes
+	.byte	0x40		// wMaxPacketSize
+	.byte	0x00		// wMaxPacketSize
+	.byte	0x00		// bInterval
+
+	.align	2
+string_lang_ids:
+	.byte	0x04
+	.byte	0x03
+	.byte	0x09
+	.byte	0x04
+
+	.align	2
+string_manufacture:
+	.byte	0x10
+	.byte	0x03
+	.byte	0x49
+	.byte	0x00
+	.byte	0x6e
+	.byte	0x00
+	.byte	0x67
+	.byte	0x00
+	.byte	0x65
+	.byte	0x00
+	.byte	0x6e
+	.byte	0x00
+	.byte	0x69
+	.byte	0x00
+	.byte	0x63
+	.byte	0x00
+
+	.align	2
+string_product:
+	.byte	0x2e
+	.byte	0x03
+	.byte	0x4a
+	.byte	0x00
+	.byte	0x5a
+	.byte	0x00
+	.byte	0x34
+	.byte	0x00
+	.byte	0x37
+	.byte	0x00
+	.byte	0x34
+	.byte	0x00
+	.byte	0x30
+	.byte	0x00
+	.byte	0x20
+	.byte	0x00
+	.byte	0x55
+	.byte	0x00
+	.byte	0x53
+	.byte	0x00
+	.byte	0x42
+	.byte	0x00
+	.byte	0x20
+	.byte	0x00
+	.byte	0x42
+	.byte	0x00
+	.byte	0x6f
+	.byte	0x00
+	.byte	0x6f
+	.byte	0x00
+	.byte	0x74
+	.byte	0x00
+	.byte	0x20
+	.byte	0x00
+	.byte	0x44
+	.byte	0x00
+	.byte	0x65
+	.byte	0x00
+	.byte	0x76
+	.byte	0x00
+	.byte	0x69
+	.byte	0x00
+	.byte	0x63
+	.byte	0x00
+	.byte	0x65
+	.byte	0x00
+
+	.align	2
+cpu_info_data:
+	.byte	0x4a
+	.byte	0x5a
+	.byte	0x34
+	.byte	0x37
+	.byte	0x34
+	.byte	0x30
+	.byte	0x56
+	.byte	0x31
+usbboot_end:
+
+    .set reorder