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path: root/arch/arm/boards/freescale-vf610-twr/flash-header-vf610-twr.imxcfg
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soc vf610
loadaddr 0x80000000
dcdofs 0x400

#define VF610_DDR_PAD_CTRL	0x00000180 /* 25 Ohm drive strength */
#define VF610_DDR_PAD_CTRL_1	0x00010180 /* 25 Ohm drive strength + differential input */

#define DDRMC_PHY_DQ_TIMING	0x00002613
#define DDRMC_PHY_DQS_TIMING	0x00002615
#define DDRMC_PHY_CTRL		0x00210000
#define DDRMC_PHY_MASTER_CTRL	0x0001012a
#define DDRMC_PHY_SLAVE_CTRL	0x00002000
#define DDRMC_PHY_OFF		0x00000000
#define DDRMC_PHY_PROC_PAD_ODT	0x00010101

#ifdef DEBUG
#define CHECKPOINT(n) wm 32 0x3f040000 n
#else
#define CHECKPOINT(n)
#endif

CHECKPOINT(1)

/* ======================= Clock initialization =======================*/

/*
 * Ungate all IP block clocks
 */
wm 32 0x4006b040 0xffffffff
wm 32 0x4006b044 0xffffffff
wm 32 0x4006b048 0xffffffff
wm 32 0x4006b04c 0xffffffff
wm 32 0x4006b050 0xffffffff
wm 32 0x4006b058 0xffffffff
wm 32 0x4006b05c 0xffffffff
wm 32 0x4006b060 0xffffffff
wm 32 0x4006b064 0xffffffff
wm 32 0x4006b068 0xffffffff
wm 32 0x4006b06c 0xffffffff


/*
 * We have to options to clock DDR controller:
 *
 *  - Use Core-A5 clock
 *  - Use PLL2 PFD2 clock
 *

 * Using first option without changing PLL settings doesn't seem to be
 * possible given that DDRMC requires minimum of 300Mhz and MaskROM
 * configures it to be clocked at 264Mhz. Changing PLL1 settings
 * proved to be challenging becuase MaskROM code executing this DCD
 * will also be fetching the rest of the bootloader via some
 * peripheral interface whose clock is derived from Cortex-A5 clock.
 *
 * As a result this DCD configuration code uses the second option of
 * clocking DDR wiht PLL2 PFD2 clock output
 *
 * Turn PLL2 on
 */
wm 32 0x40050030 0x00002001 /* Fout = Fin * 22 */

CHECKPOINT(2)

/*
 * Wait for PLLs to lock
 */
check 32 while_any_bit_clear 0x40050030 0x80000000


CHECKPOINT(3)

/*
 * Switch DDRMC to be clocked with PLL2 PFD2 and enable PFD2 output
 */
clear_bits 32 0x4006b008 0x00000040
set_bits   32 0x4006b008 0x00002000



/* ======================= DDR IOMUX ======================= */

CHECKPOINT(4)

wm 32 0x40048220 VF610_DDR_PAD_CTRL
wm 32 0x40048224 VF610_DDR_PAD_CTRL
wm 32 0x40048228 VF610_DDR_PAD_CTRL
wm 32 0x4004822c VF610_DDR_PAD_CTRL
wm 32 0x40048230 VF610_DDR_PAD_CTRL
wm 32 0x40048234 VF610_DDR_PAD_CTRL
wm 32 0x40048238 VF610_DDR_PAD_CTRL
wm 32 0x4004823c VF610_DDR_PAD_CTRL
wm 32 0x40048240 VF610_DDR_PAD_CTRL
wm 32 0x40048244 VF610_DDR_PAD_CTRL
wm 32 0x40048248 VF610_DDR_PAD_CTRL
wm 32 0x4004824c VF610_DDR_PAD_CTRL
wm 32 0x40048250 VF610_DDR_PAD_CTRL
wm 32 0x40048254 VF610_DDR_PAD_CTRL
wm 32 0x40048258 VF610_DDR_PAD_CTRL
wm 32 0x4004825c VF610_DDR_PAD_CTRL
wm 32 0x40048260 VF610_DDR_PAD_CTRL
wm 32 0x40048264 VF610_DDR_PAD_CTRL
wm 32 0x40048268 VF610_DDR_PAD_CTRL
wm 32 0x4004826c VF610_DDR_PAD_CTRL
wm 32 0x40048270 VF610_DDR_PAD_CTRL
wm 32 0x40048274 VF610_DDR_PAD_CTRL
wm 32 0x40048278 VF610_DDR_PAD_CTRL
wm 32 0x4004827c VF610_DDR_PAD_CTRL_1
wm 32 0x40048280 VF610_DDR_PAD_CTRL_1
wm 32 0x40048284 VF610_DDR_PAD_CTRL_1
wm 32 0x40048288 VF610_DDR_PAD_CTRL_1
wm 32 0x4004828c VF610_DDR_PAD_CTRL_1
wm 32 0x40048290 VF610_DDR_PAD_CTRL_1
wm 32 0x40048294 VF610_DDR_PAD_CTRL_1
wm 32 0x40048298 VF610_DDR_PAD_CTRL_1
wm 32 0x4004829c VF610_DDR_PAD_CTRL_1
wm 32 0x400482a0 VF610_DDR_PAD_CTRL_1
wm 32 0x400482a4 VF610_DDR_PAD_CTRL_1
wm 32 0x400482a8 VF610_DDR_PAD_CTRL_1
wm 32 0x400482ac VF610_DDR_PAD_CTRL_1
wm 32 0x400482b0 VF610_DDR_PAD_CTRL_1
wm 32 0x400482b4 VF610_DDR_PAD_CTRL_1
wm 32 0x400482b8 VF610_DDR_PAD_CTRL_1
wm 32 0x400482bc VF610_DDR_PAD_CTRL_1
wm 32 0x400482c0 VF610_DDR_PAD_CTRL_1
wm 32 0x400482c4 VF610_DDR_PAD_CTRL_1
wm 32 0x400482c8 VF610_DDR_PAD_CTRL_1
wm 32 0x400482cc VF610_DDR_PAD_CTRL
wm 32 0x400482d0 VF610_DDR_PAD_CTRL
wm 32 0x400482d4 VF610_DDR_PAD_CTRL
wm 32 0x400482d8 VF610_DDR_PAD_CTRL
wm 32 0x4004821c VF610_DDR_PAD_CTRL

/* ======================= DDR Controller =======================*/

CHECKPOINT(5)

wm 32 0x400ae000 0x00000600
wm 32 0x400ae008 0x00000020
wm 32 0x400ae028 0x00013880
wm 32 0x400ae02c 0x00030d40
wm 32 0x400ae030 0x0000050c
wm 32 0x400ae034 0x15040400
wm 32 0x400ae038 0x1406040f
wm 32 0x400ae040 0x04040000
wm 32 0x400ae044 0x006db00c
wm 32 0x400ae048 0x00000403
wm 32 0x400ae050 0x01000000
wm 32 0x400ae054 0x00060001
wm 32 0x400ae058 0x000c0000
wm 32 0x400ae05c 0x03000200
wm 32 0x400ae060 0x00000006
wm 32 0x400ae064 0x00010000
wm 32 0x400ae068 0x0c30002c
wm 32 0x400ae070 0x00000000
wm 32 0x400ae074 0x00000003
wm 32 0x400ae078 0x0000000a
wm 32 0x400ae07c 0x003001d4
wm 32 0x400ae084 0x00010000
wm 32 0x400ae088 0x00050500
wm 32 0x400ae098 0x00000000
wm 32 0x400ae09c 0x04001002
wm 32 0x400ae0a4 0x00000001
wm 32 0x400ae0c0 0x00460420
wm 32 0x400ae108 0x01000200
wm 32 0x400ae10c 0x00000040
wm 32 0x400ae114 0x00000200
wm 32 0x400ae118 0x00000040
wm 32 0x400ae120 0x00000000
wm 32 0x400ae124 0x0a010300
wm 32 0x400ae128 0x01014040
wm 32 0x400ae12c 0x01010101
wm 32 0x400ae130 0x03030100
wm 32 0x400ae134 0x01000101
wm 32 0x400ae138 0x0700000c
wm 32 0x400ae13c 0x00000000
wm 32 0x400ae148 0x10000000
wm 32 0x400ae15c 0x01000000
wm 32 0x400ae160 0x00040000
wm 32 0x400ae164 0x00000002
wm 32 0x400ae16c 0x00020000
wm 32 0x400ae180 0x00002819
wm 32 0x400ae184 0x01000000
wm 32 0x400ae188 0x00000000
wm 32 0x400ae18c 0x00000000
wm 32 0x400ae198 0x00010100
wm 32 0x400ae1a4 0x00000000
wm 32 0x400ae1a8 0x00000004
wm 32 0x400ae1b8 0x00040000
wm 32 0x400ae1c8 0x00000000
wm 32 0x400ae1cc 0x00000000
wm 32 0x400ae1d4 0x00000000
wm 32 0x400ae1d8 0x01010000
wm 32 0x400ae1e0 0x02020000
wm 32 0x400ae1e4 0x00000202
wm 32 0x400ae1e8 0x01010064
wm 32 0x400ae1ec 0x00010101
wm 32 0x400ae1f0 0x00000064
wm 32 0x400ae1f8 0x00000800
wm 32 0x400ae210 0x00000506
wm 32 0x400ae224 0x00020000
wm 32 0x400ae228 0x01000000
wm 32 0x400ae22c 0x04070303
wm 32 0x400ae230 0x00000040
wm 32 0x400ae23c 0x06000080
wm 32 0x400ae240 0x04070303
wm 32 0x400ae244 0x00000040
wm 32 0x400ae248 0x00000040
wm 32 0x400ae24c 0x000f0000
wm 32 0x400ae250 0x000f0000
wm 32 0x400ae25c 0x00000101
wm 32 0x400ae268 0x682c4000
wm 32 0x400ae26c 0x00000012
wm 32 0x400ae278 0x00000006
wm 32 0x400ae284 0x00010202

/* ======================= DDR PHY =======================*/

CHECKPOINT(6)

wm 32 0x400ae400 DDRMC_PHY_DQ_TIMING
wm 32 0x400ae440 DDRMC_PHY_DQ_TIMING
wm 32 0x400ae480 DDRMC_PHY_DQ_TIMING
wm 32 0x400ae404 DDRMC_PHY_DQS_TIMING
wm 32 0x400ae444 DDRMC_PHY_DQS_TIMING
wm 32 0x400ae408 DDRMC_PHY_CTRL
wm 32 0x400ae448 DDRMC_PHY_CTRL
wm 32 0x400ae488 DDRMC_PHY_CTRL
wm 32 0x400ae40c DDRMC_PHY_MASTER_CTRL
wm 32 0x400ae44c DDRMC_PHY_MASTER_CTRL
wm 32 0x400ae48c DDRMC_PHY_MASTER_CTRL
wm 32 0x400ae410 DDRMC_PHY_SLAVE_CTRL
wm 32 0x400ae450 DDRMC_PHY_SLAVE_CTRL
wm 32 0x400ae490 DDRMC_PHY_SLAVE_CTRL
wm 32 0x400ae4c4 DDRMC_PHY_OFF
wm 32 0x400ae4c8 0x00001100
wm 32 0x400ae4d0 DDRMC_PHY_PROC_PAD_ODT

wm 32 0x400ae000 0x00000601

CHECKPOINT(7)

check 32 while_any_bit_clear 0x400ae140 0x100

CHECKPOINT(8)

/*
 * Cargo cult DDR controller initialization here we come!
 *
 * Experemintation with VF610 Tower Board shows that without the
 * following code the board would not boot off of SD card when
 * power-cycled. It will however happily boot when reset via SW3/Reset
 * button. For whatever reason the following actions appear to be
 * necessary:
 *
 *          - Initialize DDRMC as usual
 *	    - Issue a read to location in DDR address space
 *	    - Disable DDRMC
 *	    - Enable DDRMC and wait for it to finish initializing
 *
 * I am sure this is all going to be extrememly embarrassing to read
 * if/when the real problem and real solution is found.
 */

/*
 * Because there's no standalone read command what we do here instead
 * is write a pattern to memory and then checking that memory address
 * against that pattern
 */
wm 32 0x80000000 0xa5a5a5a5
check 32 while_any_bit_clear 0x80000000 0xa5a5a5a5

wm 32 0x400ae000 0x00000600
wm 32 0x400ae000 0x00000601

check 32 while_any_bit_clear 0x400ae140 0x100

CHECKPOINT(9)