#include <common.h>
#include <asm/io.h>
-#include <asm/errno.h>
+#include <linux/errno.h>
+#include <wait_bit.h>
+#include <spi.h>
+#include <malloc.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_FIFO_WIDTH (4)
-
-/* Controller sram size in word */
-#define CQSPI_REG_SRAM_SIZE_WORD (128)
-#define CQSPI_REG_SRAM_RESV_WORDS (2)
-#define CQSPI_REG_SRAM_PARTITION_WR (1)
-#define CQSPI_REG_SRAM_PARTITION_RD \
- (CQSPI_REG_SRAM_SIZE_WORD - CQSPI_REG_SRAM_RESV_WORDS)
-#define CQSPI_REG_SRAM_THRESHOLD_WORDS (50)
+#define CQSPI_REG_POLL_US 1 /* 1us */
+#define CQSPI_REG_RETRY 10000
+#define CQSPI_POLL_IDLE_RETRY 3
/* 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_INDIRECTTRIGGER_ADDR_MASK (0xFFFFF)
+#define CQSPI_STIG_DATA_LEN_MAX 8
-#define CQSPI_DUMMY_CLKS_PER_BYTE (8)
-#define CQSPI_DUMMY_BYTES_MAX (4)
+#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 (1 << 0)
-#define CQSPI_REG_CONFIG_DIRECT_MASK (1 << 7)
-#define CQSPI_REG_CONFIG_DECODE_MASK (1 << 9)
-#define CQSPI_REG_CONFIG_XIP_IMM_MASK (1 << 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 (1 << 0)
-#define CQSPI_REG_INDIRECTRD_CANCEL_MASK (1 << 1)
-#define CQSPI_REG_INDIRECTRD_INPROGRESS_MASK (1 << 2)
-#define CQSPI_REG_INDIRECTRD_DONE_MASK (1 << 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 (1 << 0)
-#define CQSPI_REG_CMDCTRL_INPROGRESS_MASK (1 << 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 (1 << 0)
-#define CQSPI_REG_INDIRECTWR_CANCEL_MASK (1 << 1)
-#define CQSPI_REG_INDIRECTWR_INPROGRESS_MASK (1 << 2)
-#define CQSPI_REG_INDIRECTWR_DONE_MASK (1 << 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)
return addr;
}
-static void cadence_qspi_apb_read_fifo_data(void *dest,
- const void *src_ahb_addr, unsigned int bytes)
-{
- unsigned int temp;
- int remaining = bytes;
- unsigned int *dest_ptr = (unsigned int *)dest;
- unsigned int *src_ptr = (unsigned int *)src_ahb_addr;
-
- while (remaining > 0) {
- if (remaining >= CQSPI_FIFO_WIDTH) {
- *dest_ptr = readl(src_ptr);
- remaining -= CQSPI_FIFO_WIDTH;
- } else {
- /* dangling bytes */
- temp = readl(src_ptr);
- memcpy(dest_ptr, &temp, remaining);
- break;
- }
- dest_ptr++;
- }
-
- return;
-}
-
-static void cadence_qspi_apb_write_fifo_data(const void *dest_ahb_addr,
- const void *src, unsigned int bytes)
-{
- unsigned int temp;
- int remaining = bytes;
- unsigned int *dest_ptr = (unsigned int *)dest_ahb_addr;
- unsigned int *src_ptr = (unsigned int *)src;
-
- while (remaining > 0) {
- if (remaining >= CQSPI_FIFO_WIDTH) {
- writel(*src_ptr, dest_ptr);
- remaining -= sizeof(unsigned int);
- } else {
- /* dangling bytes */
- memcpy(&temp, src_ptr, remaining);
- writel(temp, dest_ptr);
- break;
- }
- src_ptr++;
- }
-
- return;
-}
-
-/* Read from SRAM FIFO with polling SRAM fill level. */
-static int qspi_read_sram_fifo_poll(const void *reg_base, void *dest_addr,
- const void *src_addr, unsigned int num_bytes)
-{
- unsigned int remaining = num_bytes;
- unsigned int retry;
- unsigned int sram_level = 0;
- unsigned char *dest = (unsigned char *)dest_addr;
-
- while (remaining > 0) {
- retry = CQSPI_REG_RETRY;
- while (retry--) {
- sram_level = CQSPI_GET_RD_SRAM_LEVEL(reg_base);
- if (sram_level)
- break;
- udelay(1);
- }
-
- if (!retry) {
- printf("QSPI: No receive data after polling for %d times\n",
- CQSPI_REG_RETRY);
- return -1;
- }
-
- sram_level *= CQSPI_FIFO_WIDTH;
- sram_level = sram_level > remaining ? remaining : sram_level;
-
- /* Read data from FIFO. */
- cadence_qspi_apb_read_fifo_data(dest, src_addr, sram_level);
- dest += sram_level;
- remaining -= sram_level;
- udelay(1);
- }
- return 0;
-}
-
-/* Write to SRAM FIFO with polling SRAM fill level. */
-static int qpsi_write_sram_fifo_push(struct cadence_spi_platdata *plat,
- const void *src_addr, unsigned int num_bytes)
-{
- const void *reg_base = plat->regbase;
- void *dest_addr = plat->ahbbase;
- unsigned int retry = CQSPI_REG_RETRY;
- unsigned int sram_level;
- unsigned int wr_bytes;
- unsigned char *src = (unsigned char *)src_addr;
- int remaining = num_bytes;
- unsigned int page_size = plat->page_size;
- unsigned int sram_threshold_words = CQSPI_REG_SRAM_THRESHOLD_WORDS;
-
- while (remaining > 0) {
- retry = CQSPI_REG_RETRY;
- while (retry--) {
- sram_level = CQSPI_GET_WR_SRAM_LEVEL(reg_base);
- if (sram_level <= sram_threshold_words)
- break;
- }
- if (!retry) {
- printf("QSPI: SRAM fill level (0x%08x) not hit lower expected level (0x%08x)",
- sram_level, sram_threshold_words);
- return -1;
- }
- /* Write a page or remaining bytes. */
- wr_bytes = (remaining > page_size) ?
- page_size : remaining;
-
- cadence_qspi_apb_write_fifo_data(dest_addr, src, wr_bytes);
- src += wr_bytes;
- remaining -= wr_bytes;
- }
-
- return 0;
-}
-
void cadence_qspi_apb_controller_enable(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;
}
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;
+ /*
+ * 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;
- /* 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;
- }
+ /* 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\n", __func__,
- ref_clk_hz, sclk_hz, div);
+ 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)));
- div = (div & CQSPI_REG_CONFIG_BAUD_MASK) << CQSPI_REG_CONFIG_BAUD_LSB;
- reg |= div;
+ 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)
/* Configure the remap address register, no remap */
writel(0, plat->regbase + CQSPI_REG_REMAP);
+ /* Indirect mode configurations */
+ writel(plat->fifo_depth / 2, plat->regbase + CQSPI_REG_SRAMPARTITION);
+
/* Disable all interrupts */
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);
}
/* Opcode + Address (3/4 bytes) + dummy bytes (0-4 bytes) */
int cadence_qspi_apb_indirect_read_setup(struct cadence_spi_platdata *plat,
- unsigned int cmdlen, const u8 *cmdbuf)
+ unsigned int cmdlen, unsigned int rx_width, const u8 *cmdbuf)
{
unsigned int reg;
unsigned int rd_reg;
addr_bytes = cmdlen - 1;
/* Setup the indirect trigger address */
- writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
+ writel(plat->trigger_address,
plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
- /* Configure SRAM partition for read. */
- writel(CQSPI_REG_SRAM_PARTITION_RD, plat->regbase +
- CQSPI_REG_SRAMPARTITION);
-
/* Configure the opcode */
rd_reg = cmdbuf[0] << CQSPI_REG_RD_INSTR_OPCODE_LSB;
-#if (CONFIG_SPI_FLASH_QUAD == 1)
- /* Instruction and address at DQ0, data at DQ0-3. */
- rd_reg |= CQSPI_INST_TYPE_QUAD << CQSPI_REG_RD_INSTR_TYPE_DATA_LSB;
-#endif
+ if (rx_width & SPI_RX_QUAD)
+ /* Instruction and address at DQ0, data at DQ0-3. */
+ rd_reg |= CQSPI_INST_TYPE_QUAD << CQSPI_REG_RD_INSTR_TYPE_DATA_LSB;
/* Get address */
addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
return 0;
}
+static u32 cadence_qspi_get_rd_sram_level(struct cadence_spi_platdata *plat)
+{
+ u32 reg = readl(plat->regbase + CQSPI_REG_SDRAMLEVEL);
+ reg >>= CQSPI_REG_SDRAMLEVEL_RD_LSB;
+ return reg & CQSPI_REG_SDRAMLEVEL_RD_MASK;
+}
+
+static int cadence_qspi_wait_for_data(struct cadence_spi_platdata *plat)
+{
+ unsigned int timeout = 10000;
+ u32 reg;
+
+ while (timeout--) {
+ reg = cadence_qspi_get_rd_sram_level(plat);
+ if (reg)
+ return reg;
+ udelay(1);
+ }
+
+ return -ETIMEDOUT;
+}
+
int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
- unsigned int rxlen, u8 *rxbuf)
+ unsigned int n_rx, u8 *rxbuf)
{
- unsigned int reg;
+ unsigned int remaining = n_rx;
+ unsigned int bytes_to_read = 0;
+ int ret;
- writel(rxlen, plat->regbase + CQSPI_REG_INDIRECTRDBYTES);
+ 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);
- if (qspi_read_sram_fifo_poll(plat->regbase, (void *)rxbuf,
- (const void *)plat->ahbbase, rxlen))
- goto failrd;
+ while (remaining > 0) {
+ ret = cadence_qspi_wait_for_data(plat);
+ if (ret < 0) {
+ printf("Indirect write timed out (%i)\n", ret);
+ goto failrd;
+ }
- /* Check flash indirect controller */
- reg = readl(plat->regbase + CQSPI_REG_INDIRECTRD);
- if (!(reg & CQSPI_REG_INDIRECTRD_DONE_MASK)) {
- reg = readl(plat->regbase + CQSPI_REG_INDIRECTRD);
- printf("QSPI: indirect completion status error with reg 0x%08x\n",
- reg);
+ bytes_to_read = ret;
+
+ while (bytes_to_read != 0) {
+ bytes_to_read *= plat->fifo_width;
+ bytes_to_read = bytes_to_read > remaining ?
+ remaining : bytes_to_read;
+ /*
+ * Handle non-4-byte aligned access to avoid
+ * data abort.
+ */
+ if (((uintptr_t)rxbuf % 4) || (bytes_to_read % 4))
+ readsb(plat->ahbbase, rxbuf, bytes_to_read);
+ else
+ readsl(plat->ahbbase, rxbuf,
+ bytes_to_read >> 2);
+ rxbuf += bytes_to_read;
+ remaining -= bytes_to_read;
+ bytes_to_read = cadence_qspi_get_rd_sram_level(plat);
+ }
+ }
+
+ /* Check indirect done status */
+ ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_INDIRECTRD,
+ 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 -1;
+ return ret;
}
/* Opcode + Address (3/4 bytes) */
return -EINVAL;
}
/* Setup the indirect trigger address */
- writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
+ writel(plat->trigger_address,
plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
- writel(CQSPI_REG_SRAM_PARTITION_WR,
- plat->regbase + CQSPI_REG_SRAMPARTITION);
-
/* Configure the opcode */
reg = cmdbuf[0] << CQSPI_REG_WR_INSTR_OPCODE_LSB;
writel(reg, plat->regbase + CQSPI_REG_WR_INSTR);
}
int cadence_qspi_apb_indirect_write_execute(struct cadence_spi_platdata *plat,
- unsigned int txlen, const u8 *txbuf)
+ unsigned int n_tx, const u8 *txbuf)
{
- unsigned int reg = 0;
- unsigned int retry;
+ unsigned int page_size = plat->page_size;
+ unsigned int remaining = n_tx;
+ const u8 *bb_txbuf = txbuf;
+ void *bounce_buf = NULL;
+ unsigned int write_bytes;
+ int ret;
+
+ /*
+ * Use bounce buffer for non 32 bit aligned txbuf to avoid data
+ * aborts
+ */
+ if ((uintptr_t)txbuf % 4) {
+ bounce_buf = malloc(n_tx);
+ if (!bounce_buf)
+ return -ENOMEM;
+ memcpy(bounce_buf, txbuf, n_tx);
+ bb_txbuf = bounce_buf;
+ }
/* Configure the indirect read transfer bytes */
- writel(txlen, plat->regbase + CQSPI_REG_INDIRECTWRBYTES);
+ 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);
- if (qpsi_write_sram_fifo_push(plat, (const void *)txbuf, txlen))
- goto failwr;
-
- /* Wait until last write is completed (FIFO empty) */
- retry = CQSPI_REG_RETRY;
- while (retry--) {
- reg = CQSPI_GET_WR_SRAM_LEVEL(plat->regbase);
- if (reg == 0)
- break;
-
- udelay(1);
- }
-
- if (reg != 0) {
- printf("QSPI: timeout for indirect write\n");
- goto failwr;
- }
+ while (remaining > 0) {
+ write_bytes = remaining > page_size ? page_size : remaining;
+ writesl(plat->ahbbase, bb_txbuf, write_bytes >> 2);
+ if (write_bytes % 4)
+ writesb(plat->ahbbase,
+ bb_txbuf + rounddown(write_bytes, 4),
+ write_bytes % 4);
+
+ ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_SDRAMLEVEL,
+ CQSPI_REG_SDRAMLEVEL_WR_MASK <<
+ CQSPI_REG_SDRAMLEVEL_WR_LSB, 0, 10, 0);
+ if (ret) {
+ printf("Indirect write timed out (%i)\n", ret);
+ goto failwr;
+ }
- /* Check flash indirect controller status */
- retry = CQSPI_REG_RETRY;
- while (retry--) {
- reg = readl(plat->regbase + CQSPI_REG_INDIRECTWR);
- if (reg & CQSPI_REG_INDIRECTWR_DONE_MASK)
- break;
- udelay(1);
+ bb_txbuf += write_bytes;
+ remaining -= write_bytes;
}
- if (!(reg & CQSPI_REG_INDIRECTWR_DONE_MASK)) {
- printf("QSPI: indirect completion status error with reg 0x%08x\n",
- reg);
+ /* Check indirect done status */
+ ret = wait_for_bit_le32(plat->regbase + CQSPI_REG_INDIRECTWR,
+ 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);
+ if (bounce_buf)
+ free(bounce_buf);
return 0;
failwr:
/* Cancel the indirect write */
- writel(CQSPI_REG_INDIRECTWR_CANCEL_MASK,
+ writel(CQSPI_REG_INDIRECTWR_CANCEL,
plat->regbase + CQSPI_REG_INDIRECTWR);
- return -1;
+ if (bounce_buf)
+ free(bounce_buf);
+ return ret;
}
void cadence_qspi_apb_enter_xip(void *reg_base, char xip_dummy)
/* 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 */