#include <spi.h>
#include "cadence_qspi.h"
-#define CQSPI_REG_POLL_US (1) /* 1us */
-#define CQSPI_REG_RETRY (10000)
-#define CQSPI_POLL_IDLE_RETRY (3)
+#define CQSPI_REG_POLL_US 1 /* 1us */
+#define CQSPI_REG_RETRY 10000
+#define CQSPI_POLL_IDLE_RETRY 3
-#define CQSPI_FIFO_WIDTH (4)
+#define CQSPI_FIFO_WIDTH 4
-#define CQSPI_REG_SRAM_THRESHOLD_WORDS (50)
+#define CQSPI_REG_SRAM_THRESHOLD_WORDS 50
/* Transfer mode */
-#define CQSPI_INST_TYPE_SINGLE (0)
-#define CQSPI_INST_TYPE_DUAL (1)
-#define CQSPI_INST_TYPE_QUAD (2)
+#define CQSPI_INST_TYPE_SINGLE 0
+#define CQSPI_INST_TYPE_DUAL 1
+#define CQSPI_INST_TYPE_QUAD 2
-#define CQSPI_STIG_DATA_LEN_MAX (8)
-
-#define CQSPI_DUMMY_CLKS_PER_BYTE (8)
-#define CQSPI_DUMMY_BYTES_MAX (4)
+#define CQSPI_STIG_DATA_LEN_MAX 8
+#define CQSPI_DUMMY_CLKS_PER_BYTE 8
+#define CQSPI_DUMMY_BYTES_MAX 4
#define CQSPI_REG_SRAM_FILL_THRESHOLD \
((CQSPI_REG_SRAM_SIZE_WORD / 2) * CQSPI_FIFO_WIDTH)
+
/****************************************************************************
* Controller's configuration and status register (offset from QSPI_BASE)
****************************************************************************/
#define CQSPI_REG_CONFIG 0x00
-#define CQSPI_REG_CONFIG_CLK_POL_LSB 1
-#define CQSPI_REG_CONFIG_CLK_PHA_LSB 2
-#define CQSPI_REG_CONFIG_ENABLE_MASK BIT(0)
-#define CQSPI_REG_CONFIG_DIRECT_MASK BIT(7)
-#define CQSPI_REG_CONFIG_DECODE_MASK BIT(9)
-#define CQSPI_REG_CONFIG_XIP_IMM_MASK BIT(18)
+#define CQSPI_REG_CONFIG_ENABLE BIT(0)
+#define CQSPI_REG_CONFIG_CLK_POL BIT(1)
+#define CQSPI_REG_CONFIG_CLK_PHA BIT(2)
+#define CQSPI_REG_CONFIG_DIRECT BIT(7)
+#define CQSPI_REG_CONFIG_DECODE BIT(9)
+#define CQSPI_REG_CONFIG_XIP_IMM BIT(18)
#define CQSPI_REG_CONFIG_CHIPSELECT_LSB 10
#define CQSPI_REG_CONFIG_BAUD_LSB 19
#define CQSPI_REG_CONFIG_IDLE_LSB 31
#define CQSPI_REG_DELAY_TSD2D_MASK 0xFF
#define CQSPI_REG_DELAY_TSHSL_MASK 0xFF
-#define CQSPI_READLCAPTURE 0x10
-#define CQSPI_READLCAPTURE_BYPASS_LSB 0
-#define CQSPI_READLCAPTURE_DELAY_LSB 1
-#define CQSPI_READLCAPTURE_DELAY_MASK 0xF
+#define CQSPI_REG_RD_DATA_CAPTURE 0x10
+#define CQSPI_REG_RD_DATA_CAPTURE_BYPASS BIT(0)
+#define CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB 1
+#define CQSPI_REG_RD_DATA_CAPTURE_DELAY_MASK 0xF
#define CQSPI_REG_SIZE 0x14
#define CQSPI_REG_SIZE_ADDRESS_LSB 0
#define CQSPI_REG_IRQMASK 0x44
#define CQSPI_REG_INDIRECTRD 0x60
-#define CQSPI_REG_INDIRECTRD_START_MASK BIT(0)
-#define CQSPI_REG_INDIRECTRD_CANCEL_MASK BIT(1)
-#define CQSPI_REG_INDIRECTRD_INPROGRESS_MASK BIT(2)
-#define CQSPI_REG_INDIRECTRD_DONE_MASK BIT(5)
+#define CQSPI_REG_INDIRECTRD_START BIT(0)
+#define CQSPI_REG_INDIRECTRD_CANCEL BIT(1)
+#define CQSPI_REG_INDIRECTRD_INPROGRESS BIT(2)
+#define CQSPI_REG_INDIRECTRD_DONE BIT(5)
#define CQSPI_REG_INDIRECTRDWATERMARK 0x64
#define CQSPI_REG_INDIRECTRDSTARTADDR 0x68
#define CQSPI_REG_INDIRECTRDBYTES 0x6C
#define CQSPI_REG_CMDCTRL 0x90
-#define CQSPI_REG_CMDCTRL_EXECUTE_MASK BIT(0)
-#define CQSPI_REG_CMDCTRL_INPROGRESS_MASK BIT(1)
+#define CQSPI_REG_CMDCTRL_EXECUTE BIT(0)
+#define CQSPI_REG_CMDCTRL_INPROGRESS BIT(1)
#define CQSPI_REG_CMDCTRL_DUMMY_LSB 7
#define CQSPI_REG_CMDCTRL_WR_BYTES_LSB 12
#define CQSPI_REG_CMDCTRL_WR_EN_LSB 15
#define CQSPI_REG_CMDCTRL_OPCODE_MASK 0xFF
#define CQSPI_REG_INDIRECTWR 0x70
-#define CQSPI_REG_INDIRECTWR_START_MASK BIT(0)
-#define CQSPI_REG_INDIRECTWR_CANCEL_MASK BIT(1)
-#define CQSPI_REG_INDIRECTWR_INPROGRESS_MASK BIT(2)
-#define CQSPI_REG_INDIRECTWR_DONE_MASK BIT(5)
+#define CQSPI_REG_INDIRECTWR_START BIT(0)
+#define CQSPI_REG_INDIRECTWR_CANCEL BIT(1)
+#define CQSPI_REG_INDIRECTWR_INPROGRESS BIT(2)
+#define CQSPI_REG_INDIRECTWR_DONE BIT(5)
#define CQSPI_REG_INDIRECTWRWATERMARK 0x74
#define CQSPI_REG_INDIRECTWRSTARTADDR 0x78
((readl(base + CQSPI_REG_CONFIG) >> \
CQSPI_REG_CONFIG_IDLE_LSB) & 0x1)
-#define CQSPI_CAL_DELAY(tdelay_ns, tref_ns, tsclk_ns) \
- ((((tdelay_ns) - (tsclk_ns)) / (tref_ns)))
-
#define CQSPI_GET_RD_SRAM_LEVEL(reg_base) \
(((readl(reg_base + CQSPI_REG_SDRAMLEVEL)) >> \
CQSPI_REG_SDRAMLEVEL_RD_LSB) & CQSPI_REG_SDRAMLEVEL_RD_MASK)
{
unsigned int reg;
reg = readl(reg_base + CQSPI_REG_CONFIG);
- reg |= CQSPI_REG_CONFIG_ENABLE_MASK;
+ reg |= CQSPI_REG_CONFIG_ENABLE;
writel(reg, reg_base + CQSPI_REG_CONFIG);
- return;
}
void cadence_qspi_apb_controller_disable(void *reg_base)
{
unsigned int reg;
reg = readl(reg_base + CQSPI_REG_CONFIG);
- reg &= ~CQSPI_REG_CONFIG_ENABLE_MASK;
+ reg &= ~CQSPI_REG_CONFIG_ENABLE;
writel(reg, reg_base + CQSPI_REG_CONFIG);
- return;
}
/* Return 1 if idle, otherwise return 0 (busy). */
unsigned int reg;
cadence_qspi_apb_controller_disable(reg_base);
- reg = readl(reg_base + CQSPI_READLCAPTURE);
+ reg = readl(reg_base + CQSPI_REG_RD_DATA_CAPTURE);
if (bypass)
- reg |= (1 << CQSPI_READLCAPTURE_BYPASS_LSB);
+ reg |= CQSPI_REG_RD_DATA_CAPTURE_BYPASS;
else
- reg &= ~(1 << CQSPI_READLCAPTURE_BYPASS_LSB);
+ reg &= ~CQSPI_REG_RD_DATA_CAPTURE_BYPASS;
- reg &= ~(CQSPI_READLCAPTURE_DELAY_MASK
- << CQSPI_READLCAPTURE_DELAY_LSB);
+ reg &= ~(CQSPI_REG_RD_DATA_CAPTURE_DELAY_MASK
+ << CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB);
- reg |= ((delay & CQSPI_READLCAPTURE_DELAY_MASK)
- << CQSPI_READLCAPTURE_DELAY_LSB);
+ reg |= (delay & CQSPI_REG_RD_DATA_CAPTURE_DELAY_MASK)
+ << CQSPI_REG_RD_DATA_CAPTURE_DELAY_LSB;
- writel(reg, reg_base + CQSPI_READLCAPTURE);
+ writel(reg, reg_base + CQSPI_REG_RD_DATA_CAPTURE);
cadence_qspi_apb_controller_enable(reg_base);
- return;
}
void cadence_qspi_apb_config_baudrate_div(void *reg_base,
reg = readl(reg_base + CQSPI_REG_CONFIG);
reg &= ~(CQSPI_REG_CONFIG_BAUD_MASK << CQSPI_REG_CONFIG_BAUD_LSB);
- div = ref_clk_hz / sclk_hz;
-
- if (div > 32)
- div = 32;
-
- /* Check if even number. */
- if ((div & 1)) {
- div = (div / 2);
- } else {
- if (ref_clk_hz % sclk_hz)
- /* ensure generated SCLK doesn't exceed user
- specified sclk_hz */
- div = (div / 2);
- else
- div = (div / 2) - 1;
- }
-
- debug("%s: ref_clk %dHz sclk %dHz Div 0x%x\n", __func__,
- ref_clk_hz, sclk_hz, div);
+ /*
+ * The baud_div field in the config reg is 4 bits, and the ref clock is
+ * divided by 2 * (baud_div + 1). Round up the divider to ensure the
+ * SPI clock rate is less than or equal to the requested clock rate.
+ */
+ div = DIV_ROUND_UP(ref_clk_hz, sclk_hz * 2) - 1;
/* ensure the baud rate doesn't exceed the max value */
if (div > CQSPI_REG_CONFIG_BAUD_MASK)
div = CQSPI_REG_CONFIG_BAUD_MASK;
+ debug("%s: ref_clk %dHz sclk %dHz Div 0x%x, actual %dHz\n", __func__,
+ ref_clk_hz, sclk_hz, div, ref_clk_hz / (2 * (div + 1)));
+
reg |= (div << CQSPI_REG_CONFIG_BAUD_LSB);
writel(reg, reg_base + CQSPI_REG_CONFIG);
cadence_qspi_apb_controller_enable(reg_base);
- return;
}
-void cadence_qspi_apb_set_clk_mode(void *reg_base,
- unsigned int clk_pol, unsigned int clk_pha)
+void cadence_qspi_apb_set_clk_mode(void *reg_base, uint mode)
{
unsigned int reg;
cadence_qspi_apb_controller_disable(reg_base);
reg = readl(reg_base + CQSPI_REG_CONFIG);
- reg &= ~(1 <<
- (CQSPI_REG_CONFIG_CLK_POL_LSB | CQSPI_REG_CONFIG_CLK_PHA_LSB));
+ reg &= ~(CQSPI_REG_CONFIG_CLK_POL | CQSPI_REG_CONFIG_CLK_PHA);
- reg |= ((clk_pol & 0x1) << CQSPI_REG_CONFIG_CLK_POL_LSB);
- reg |= ((clk_pha & 0x1) << CQSPI_REG_CONFIG_CLK_PHA_LSB);
+ if (mode & SPI_CPOL)
+ reg |= CQSPI_REG_CONFIG_CLK_POL;
+ if (mode & SPI_CPHA)
+ reg |= CQSPI_REG_CONFIG_CLK_PHA;
writel(reg, reg_base + CQSPI_REG_CONFIG);
cadence_qspi_apb_controller_enable(reg_base);
- return;
}
void cadence_qspi_apb_chipselect(void *reg_base,
reg = readl(reg_base + CQSPI_REG_CONFIG);
/* docoder */
if (decoder_enable) {
- reg |= CQSPI_REG_CONFIG_DECODE_MASK;
+ reg |= CQSPI_REG_CONFIG_DECODE;
} else {
- reg &= ~CQSPI_REG_CONFIG_DECODE_MASK;
+ reg &= ~CQSPI_REG_CONFIG_DECODE;
/* Convert CS if without decoder.
* CS0 to 4b'1110
* CS1 to 4b'1101
writel(reg, reg_base + CQSPI_REG_CONFIG);
cadence_qspi_apb_controller_enable(reg_base);
- return;
}
void cadence_qspi_apb_delay(void *reg_base,
cadence_qspi_apb_controller_disable(reg_base);
/* Convert to ns. */
- ref_clk_ns = (1000000000) / ref_clk;
+ ref_clk_ns = DIV_ROUND_UP(1000000000, ref_clk);
/* Convert to ns. */
- sclk_ns = (1000000000) / sclk_hz;
-
- /* Plus 1 to round up 1 clock cycle. */
- tshsl = CQSPI_CAL_DELAY(tshsl_ns, ref_clk_ns, sclk_ns) + 1;
- tchsh = CQSPI_CAL_DELAY(tchsh_ns, ref_clk_ns, sclk_ns) + 1;
- tslch = CQSPI_CAL_DELAY(tslch_ns, ref_clk_ns, sclk_ns) + 1;
- tsd2d = CQSPI_CAL_DELAY(tsd2d_ns, ref_clk_ns, sclk_ns) + 1;
+ sclk_ns = DIV_ROUND_UP(1000000000, sclk_hz);
+
+ /* The controller adds additional delay to that programmed in the reg */
+ if (tshsl_ns >= sclk_ns + ref_clk_ns)
+ tshsl_ns -= sclk_ns + ref_clk_ns;
+ if (tchsh_ns >= sclk_ns + 3 * ref_clk_ns)
+ tchsh_ns -= sclk_ns + 3 * ref_clk_ns;
+ tshsl = DIV_ROUND_UP(tshsl_ns, ref_clk_ns);
+ tchsh = DIV_ROUND_UP(tchsh_ns, ref_clk_ns);
+ tslch = DIV_ROUND_UP(tslch_ns, ref_clk_ns);
+ tsd2d = DIV_ROUND_UP(tsd2d_ns, ref_clk_ns);
reg = ((tshsl & CQSPI_REG_DELAY_TSHSL_MASK)
<< CQSPI_REG_DELAY_TSHSL_LSB);
writel(reg, reg_base + CQSPI_REG_DELAY);
cadence_qspi_apb_controller_enable(reg_base);
- return;
}
void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat)
writel(0, plat->regbase + CQSPI_REG_IRQMASK);
cadence_qspi_apb_controller_enable(plat->regbase);
- return;
}
static int cadence_qspi_apb_exec_flash_cmd(void *reg_base,
/* Write the CMDCTRL without start execution. */
writel(reg, reg_base + CQSPI_REG_CMDCTRL);
/* Start execute */
- reg |= CQSPI_REG_CMDCTRL_EXECUTE_MASK;
+ reg |= CQSPI_REG_CMDCTRL_EXECUTE;
writel(reg, reg_base + CQSPI_REG_CMDCTRL);
while (retry--) {
reg = readl(reg_base + CQSPI_REG_CMDCTRL);
- if ((reg & CQSPI_REG_CMDCTRL_INPROGRESS_MASK) == 0)
+ if ((reg & CQSPI_REG_CMDCTRL_INPROGRESS) == 0)
break;
udelay(1);
}
writel(n_rx, plat->regbase + CQSPI_REG_INDIRECTRDBYTES);
/* Start the indirect read transfer */
- writel(CQSPI_REG_INDIRECTRD_START_MASK,
+ writel(CQSPI_REG_INDIRECTRD_START,
plat->regbase + CQSPI_REG_INDIRECTRD);
while (remaining > 0) {
/* Check indirect done status */
ret = wait_for_bit("QSPI", plat->regbase + CQSPI_REG_INDIRECTRD,
- CQSPI_REG_INDIRECTRD_DONE_MASK, 1, 10, 0);
+ CQSPI_REG_INDIRECTRD_DONE, 1, 10, 0);
if (ret) {
printf("Indirect read completion error (%i)\n", ret);
goto failrd;
}
/* Clear indirect completion status */
- writel(CQSPI_REG_INDIRECTRD_DONE_MASK,
+ writel(CQSPI_REG_INDIRECTRD_DONE,
plat->regbase + CQSPI_REG_INDIRECTRD);
return 0;
failrd:
/* Cancel the indirect read */
- writel(CQSPI_REG_INDIRECTRD_CANCEL_MASK,
+ writel(CQSPI_REG_INDIRECTRD_CANCEL,
plat->regbase + CQSPI_REG_INDIRECTRD);
return ret;
}
writel(n_tx, plat->regbase + CQSPI_REG_INDIRECTWRBYTES);
/* Start the indirect write transfer */
- writel(CQSPI_REG_INDIRECTWR_START_MASK,
+ writel(CQSPI_REG_INDIRECTWR_START,
plat->regbase + CQSPI_REG_INDIRECTWR);
while (remaining > 0) {
/* Check indirect done status */
ret = wait_for_bit("QSPI", plat->regbase + CQSPI_REG_INDIRECTWR,
- CQSPI_REG_INDIRECTWR_DONE_MASK, 1, 10, 0);
+ CQSPI_REG_INDIRECTWR_DONE, 1, 10, 0);
if (ret) {
printf("Indirect write completion error (%i)\n", ret);
goto failwr;
}
/* Clear indirect completion status */
- writel(CQSPI_REG_INDIRECTWR_DONE_MASK,
+ writel(CQSPI_REG_INDIRECTWR_DONE,
plat->regbase + CQSPI_REG_INDIRECTWR);
return 0;
failwr:
/* Cancel the indirect write */
- writel(CQSPI_REG_INDIRECTWR_CANCEL_MASK,
+ writel(CQSPI_REG_INDIRECTWR_CANCEL,
plat->regbase + CQSPI_REG_INDIRECTWR);
return ret;
}
/* enter XiP mode immediately and enable direct mode */
reg = readl(reg_base + CQSPI_REG_CONFIG);
- reg |= CQSPI_REG_CONFIG_ENABLE_MASK;
- reg |= CQSPI_REG_CONFIG_DIRECT_MASK;
- reg |= CQSPI_REG_CONFIG_XIP_IMM_MASK;
+ reg |= CQSPI_REG_CONFIG_ENABLE;
+ reg |= CQSPI_REG_CONFIG_DIRECT;
+ reg |= CQSPI_REG_CONFIG_XIP_IMM;
writel(reg, reg_base + CQSPI_REG_CONFIG);
/* keep the XiP mode */
projects / oweals / u-boot.git / commitdiff