u-boot/board/kontron/sl28/spl.c
Michael Walle 805b2423b4 board: sl28: add SATA support
Enable SATA support. Although not supported by the usual SATA pins on
the SMARC baseboard connector, SATA mode is supported on a PCIe lane.
This way one can use a mSATA card in a Mini PCI slot.

We need to invert the received data because in this mode the polarity of
the SerDes lane is swapped. Provide a fixup in board_early_init_f() for
the SPL. board_early_init_f() is then not common between SPL and u-boot
proper anymore, thus common.c is removed, as it just contained said
function.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
2021-02-08 14:01:16 +05:30

70 lines
1.6 KiB
C

// SPDX-License-Identifier: GPL-2.0+
#include <common.h>
#include <asm/io.h>
#include <asm/spl.h>
#include <asm/arch-fsl-layerscape/fsl_serdes.h>
#include <asm/arch-fsl-layerscape/soc.h>
#define DCFG_RCWSR25 0x160
#define GPINFO_HW_VARIANT_MASK 0xff
#define SERDES_LNDGCR0 0x1ea08c0
#define LNDGCR0_PROTS_MASK GENMASK(11, 7)
#define LNDGCR0_PROTS_SATA (0x2 << 7)
#define SERDES_LNDGCR1 0x1ea08c4
#define LNDGCR1_RDAT_INV BIT(31)
/*
* On this board the SMARC PCIe lane D might be switched to SATA mode. This
* makes sense if this lane is connected to a Mini PCI slot and a mSATA card
* is plugged in. In this case, the RX pair is swapped and we need to invert
* the received data.
*/
static void fixup_sata_rx_polarity(void)
{
u32 prot = in_le32(SERDES_LNDGCR0) & LNDGCR0_PROTS_MASK;
u32 tmp;
if (prot == LNDGCR0_PROTS_SATA) {
tmp = in_le32(SERDES_LNDGCR1);
tmp |= LNDGCR1_RDAT_INV;
out_le32(SERDES_LNDGCR1, tmp);
}
}
int sl28_variant(void)
{
return in_le32(DCFG_BASE + DCFG_RCWSR25) & GPINFO_HW_VARIANT_MASK;
}
int board_fit_config_name_match(const char *name)
{
int variant = sl28_variant();
switch (variant) {
case 1:
return strcmp(name, "fsl-ls1028a-kontron-sl28-var1");
case 2:
return strcmp(name, "fsl-ls1028a-kontron-sl28-var2");
case 3:
return strcmp(name, "fsl-ls1028a-kontron-sl28-var3");
case 4:
return strcmp(name, "fsl-ls1028a-kontron-sl28-var4");
default:
return strcmp(name, "fsl-ls1028a-kontron-sl28");
}
}
void board_boot_order(u32 *spl_boot_list)
{
spl_boot_list[0] = BOOT_DEVICE_SPI;
}
int board_early_init_f(void)
{
fixup_sata_rx_polarity();
fsl_lsch3_early_init_f();
return 0;
}