diff options
| author | York Sun <yorksun@freescale.com> | 2014-03-27 17:54:47 -0700 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2014-04-22 17:58:48 -0700 |
| commit | 34e026f9b1eb3bcffb38e7787c2e6eac0e88ba85 (patch) | |
| tree | f155ebdbac95a5ef637e7796ad22935029a56ce6 /drivers/ddr/fsl/main.c | |
| parent | 8d451a7129ee6820cc126c77f0f0a175a2cb2e8d (diff) | |
| download | u-boot-imx-34e026f9b1eb3bcffb38e7787c2e6eac0e88ba85.zip u-boot-imx-34e026f9b1eb3bcffb38e7787c2e6eac0e88ba85.tar.gz u-boot-imx-34e026f9b1eb3bcffb38e7787c2e6eac0e88ba85.tar.bz2 | |
driver/ddr/fsl: Add DDR4 support to Freescale DDR driver
Mostly reusing DDR3 driver, this patch adds DDR4 SPD handling, register
calculation and programming.
Signed-off-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'drivers/ddr/fsl/main.c')
| -rw-r--r-- | drivers/ddr/fsl/main.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/ddr/fsl/main.c b/drivers/ddr/fsl/main.c index d62ca63..f95704f 100644 --- a/drivers/ddr/fsl/main.c +++ b/drivers/ddr/fsl/main.c @@ -1,5 +1,5 @@ /* - * Copyright 2008-2012 Freescale Semiconductor, Inc. + * Copyright 2008-2014 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -81,14 +81,37 @@ u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = { #endif +#define SPD_SPA0_ADDRESS 0x36 +#define SPD_SPA1_ADDRESS 0x37 + static void __get_spd(generic_spd_eeprom_t *spd, u8 i2c_address) { int ret; +#ifdef CONFIG_SYS_FSL_DDR4 + uint8_t dummy = 0; +#endif i2c_set_bus_num(CONFIG_SYS_SPD_BUS_NUM); +#ifdef CONFIG_SYS_FSL_DDR4 + /* + * DDR4 SPD has 384 to 512 bytes + * To access the lower 256 bytes, we need to set EE page address to 0 + * To access the upper 256 bytes, we need to set EE page address to 1 + * See Jedec standar No. 21-C for detail + */ + i2c_write(SPD_SPA0_ADDRESS, 0, 1, &dummy, 1); + ret = i2c_read(i2c_address, 0, 1, (uchar *)spd, 256); + if (!ret) { + i2c_write(SPD_SPA1_ADDRESS, 0, 1, &dummy, 1); + ret = i2c_read(i2c_address, 0, 1, + (uchar *)((ulong)spd + 256), + min(256, sizeof(generic_spd_eeprom_t) - 256)); + } +#else ret = i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(generic_spd_eeprom_t)); +#endif if (ret) { if (i2c_address == |