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spi: zynqmp_gqspi: Add tap delays for Versal

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Add tap delays for Versal platform and re-align the tapdelays code.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Link: https://lore.kernel.org/r/20220825125906.11581-2-ashok.reddy.soma@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
This commit is contained in:
Ashok Reddy Soma 2022-08-25 06:59:01 -06:00 committed by Michal Simek
parent f7d4cab1b3
commit f4f1b65cc6
1 changed files with 38 additions and 22 deletions
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56
drivers/spi/zynqmp_gqspi.c
View file

@ -22,6 +22,7 @@
#include <dm/device_compat.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <zynqmp_firmware.h>
#define GQSPI_GFIFO_STRT_MODE_MASK BIT(29)
#define GQSPI_CONFIG_MODE_EN_MASK (3 << 30)
@ -102,8 +103,10 @@
#define TAP_DLY_BYPASS_LQSPI_RX_VALUE 0x1
#define TAP_DLY_BYPASS_LQSPI_RX_SHIFT 2
#define GQSPI_DATA_DLY_ADJ_OFST 0x000001F8
#define IOU_TAPDLY_BYPASS_OFST 0xFF180390
#define IOU_TAPDLY_BYPASS_OFST !IS_ENABLED(CONFIG_ARCH_VERSAL) ? \
0xFF180390 : 0xF103003C
#define GQSPI_LPBK_DLY_ADJ_LPBK_MASK 0x00000020
#define GQSPI_FREQ_37_5MHZ 37500000
#define GQSPI_FREQ_40MHZ 40000000
#define GQSPI_FREQ_100MHZ 100000000
#define GQSPI_FREQ_150MHZ 150000000
@ -297,28 +300,41 @@ void zynqmp_qspi_set_tapdelay(struct udevice *bus, u32 baudrateval)
debug("%s, req_hz:%d, clk_rate:%d, baudrateval:%d\n",
__func__, reqhz, clk_rate, baudrateval);
if (reqhz < GQSPI_FREQ_40MHZ) {
zynqmp_mmio_read(IOU_TAPDLY_BYPASS_OFST, &tapdlybypass);
tapdlybypass |= (TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
TAP_DLY_BYPASS_LQSPI_RX_SHIFT);
if (!IS_ENABLED(CONFIG_ARCH_VERSAL)) {
if (reqhz <= GQSPI_FREQ_40MHZ) {
tapdlybypass = TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
TAP_DLY_BYPASS_LQSPI_RX_SHIFT;
} else if (reqhz <= GQSPI_FREQ_100MHZ) {
zynqmp_mmio_read(IOU_TAPDLY_BYPASS_OFST, &tapdlybypass);
tapdlybypass |= (TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
TAP_DLY_BYPASS_LQSPI_RX_SHIFT);
lpbkdlyadj = readl(&regs->lpbkdly);
lpbkdlyadj |= (GQSPI_LPBK_DLY_ADJ_LPBK_MASK);
datadlyadj = readl(&regs->gqspidlyadj);
datadlyadj |= ((GQSPI_USE_DATA_DLY << GQSPI_USE_DATA_DLY_SHIFT)
| (GQSPI_DATA_DLY_ADJ_VALUE <<
GQSPI_DATA_DLY_ADJ_SHIFT));
tapdlybypass = TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
TAP_DLY_BYPASS_LQSPI_RX_SHIFT;
lpbkdlyadj = GQSPI_LPBK_DLY_ADJ_LPBK_MASK;
datadlyadj = (GQSPI_USE_DATA_DLY <<
GQSPI_USE_DATA_DLY_SHIFT) |
(GQSPI_DATA_DLY_ADJ_VALUE <<
GQSPI_DATA_DLY_ADJ_SHIFT);
} else if (reqhz <= GQSPI_FREQ_150MHZ) {
lpbkdlyadj = readl(&regs->lpbkdly);
lpbkdlyadj |= ((GQSPI_LPBK_DLY_ADJ_LPBK_MASK) |
GQSPI_LPBK_DLY_ADJ_DLY_0);
lpbkdlyadj = GQSPI_LPBK_DLY_ADJ_LPBK_MASK |
GQSPI_LPBK_DLY_ADJ_DLY_0;
}
zynqmp_mmio_write(IOU_TAPDLY_BYPASS_OFST,
IOU_TAPDLY_BYPASS_MASK, tapdlybypass);
} else {
if (reqhz <= GQSPI_FREQ_37_5MHZ) {
tapdlybypass = TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
TAP_DLY_BYPASS_LQSPI_RX_SHIFT;
} else if (reqhz <= GQSPI_FREQ_100MHZ) {
tapdlybypass = TAP_DLY_BYPASS_LQSPI_RX_VALUE <<
TAP_DLY_BYPASS_LQSPI_RX_SHIFT;
lpbkdlyadj = GQSPI_LPBK_DLY_ADJ_LPBK_MASK;
datadlyadj = GQSPI_USE_DATA_DLY <<
GQSPI_USE_DATA_DLY_SHIFT;
} else if (reqhz <= GQSPI_FREQ_150MHZ) {
lpbkdlyadj = GQSPI_LPBK_DLY_ADJ_LPBK_MASK |
(GQSPI_LPBK_DLY_ADJ_DLY_1 <<
GQSPI_LPBK_DLY_ADJ_DLY_1_SHIFT);
}
writel(tapdlybypass, IOU_TAPDLY_BYPASS_OFST);
}
zynqmp_mmio_write(IOU_TAPDLY_BYPASS_OFST, IOU_TAPDLY_BYPASS_MASK,
tapdlybypass);
writel(lpbkdlyadj, &regs->lpbkdly);
writel(datadlyadj, &regs->gqspidlyadj);
}