[U-Boot] [PATCH 1/3] ARM:MX6SX Add QuadSPI support for mx6sxsabresd
Peng Fan
Peng.Fan at freescale.com
Wed Sep 10 08:16:55 CEST 2014
From: Peng Fan <van.freenix at gmail.com>
Add QuadSPI support for mx6sxsabresd board.
There are two 16MB S25FL128S flashes on board. They are connected to
QSPI2 interface. i.MX6SX supports two QuadSPI interfaces, QSPI1/2.
The two flash devices are connected to A1/B1 of QSPI2.
Signed-off-by: Peng Fan <van.freenix at gmail.com>
---
arch/arm/cpu/armv7/mx6/clock.c | 50 +++++++++++++++++++++++++++++
arch/arm/include/asm/arch-mx6/clock.h | 3 ++
board/freescale/mx6sxsabresd/mx6sxsabresd.c | 40 +++++++++++++++++++++++
drivers/spi/fsl_qspi.c | 30 +++++++++++++++++
include/configs/mx6sxsabresd.h | 14 ++++++++
5 files changed, 137 insertions(+)
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 820b8d5..8caa61d 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -340,6 +340,56 @@ static u32 get_mmdc_ch0_clk(void)
}
#endif
+#ifdef CONFIG_MX6SX
+/* qspi_num can be from 0 - 1 */
+void enable_qspi_clk(int qspi_num)
+{
+ u32 reg = 0;
+ /* Enable QuadSPI clock */
+ switch (qspi_num) {
+ case 0:
+ /* disable the clock gate */
+ clrbits_le32(&imx_ccm->CCGR3, MXC_CCM_CCGR3_QSPI1_MASK);
+
+ /* set 50M : (50 = 396 / 2 / 4) */
+ reg = readl(&imx_ccm->cscmr1);
+ reg &= ~(MXC_CCM_CSCMR1_QSPI1_PODF_MASK |
+ MXC_CCM_CSCMR1_QSPI1_CLK_SEL_MASK);
+ reg |= ((1 << MXC_CCM_CSCMR1_QSPI1_PODF_OFFSET) |
+ (2 << MXC_CCM_CSCMR1_QSPI1_CLK_SEL_OFFSET));
+ writel(reg, &imx_ccm->cscmr1);
+
+ /* enable the clock gate */
+ setbits_le32(&imx_ccm->CCGR3, MXC_CCM_CCGR3_QSPI1_MASK);
+ break;
+ case 1:
+ /*
+ * disable the clock gate
+ * QSPI2 and GPMI_BCH_INPUT_GPMI_IO share the same clock gate,
+ * disable both of them.
+ */
+ clrbits_le32(&imx_ccm->CCGR4, MXC_CCM_CCGR4_QSPI2_ENFC_MASK |
+ MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK);
+
+ /* set 50M : (50 = 396 / 2 / 4) */
+ reg = readl(&imx_ccm->cs2cdr);
+ reg &= ~(MXC_CCM_CS2CDR_QSPI2_CLK_PODF_MASK |
+ MXC_CCM_CS2CDR_QSPI2_CLK_PRED_MASK |
+ MXC_CCM_CS2CDR_QSPI2_CLK_SEL_MASK);
+ reg |= (MXC_CCM_CS2CDR_QSPI2_CLK_PRED(0x1) |
+ MXC_CCM_CS2CDR_QSPI2_CLK_SEL(0x3));
+ writel(reg, &imx_ccm->cs2cdr);
+
+ /*enable the clock gate*/
+ setbits_le32(&imx_ccm->CCGR4, MXC_CCM_CCGR4_QSPI2_ENFC_MASK |
+ MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK);
+ break;
+ default:
+ break;
+ }
+}
+#endif
+
#ifdef CONFIG_FEC_MXC
int enable_fec_anatop_clock(enum enet_freq freq)
{
diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h
index 339c789..9d0ba7a 100644
--- a/arch/arm/include/asm/arch-mx6/clock.h
+++ b/arch/arm/include/asm/arch-mx6/clock.h
@@ -60,4 +60,7 @@ int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
int enable_spi_clk(unsigned char enable, unsigned spi_num);
void enable_ipu_clock(void);
int enable_fec_anatop_clock(enum enet_freq freq);
+#ifdef CONFIG_MX6SX
+void enable_qspi_clk(int qspi_num);
+#endif
#endif /* __ASM_ARCH_CLOCK_H */
diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
index 5eaec1b..f9cad5a 100644
--- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c
+++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
@@ -272,11 +272,51 @@ int board_mmc_init(bd_t *bis)
return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
}
+#ifdef CONFIG_FSL_QSPI
+
+#define QSPI_PAD_CTRL1 \
+ (PAD_CTL_SRE_FAST | PAD_CTL_SPEED_HIGH | \
+ PAD_CTL_PKE | PAD_CTL_PUE | PAD_CTL_PUS_47K_UP | PAD_CTL_DSE_40ohm)
+
+static iomux_v3_cfg_t const quadspi_pads[] = {
+ MX6_PAD_NAND_WP_B__QSPI2_A_DATA_0 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_READY_B__QSPI2_A_DATA_1 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_CE0_B__QSPI2_A_DATA_2 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_CE1_B__QSPI2_A_DATA_3 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_ALE__QSPI2_A_SS0_B | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_CLE__QSPI2_A_SCLK | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_DATA07__QSPI2_A_DQS | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_DATA01__QSPI2_B_DATA_0 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_DATA00__QSPI2_B_DATA_1 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_WE_B__QSPI2_B_DATA_2 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_RE_B__QSPI2_B_DATA_3 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_DATA03__QSPI2_B_SS0_B | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_DATA02__QSPI2_B_SCLK | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+ MX6_PAD_NAND_DATA05__QSPI2_B_DQS | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+};
+
+int board_qspi_init(void)
+{
+ /* Set the iomux */
+ imx_iomux_v3_setup_multiple_pads(quadspi_pads,
+ ARRAY_SIZE(quadspi_pads));
+
+ /* Set the clock */
+ enable_qspi_clk(1);
+
+ return 0;
+}
+#endif
+
int board_init(void)
{
/* Address of boot parameters */
gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+#ifdef CONFIG_FSL_QSPI
+ board_qspi_init();
+#endif
+
return 0;
}
diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c
index ba20bef..7e8d07e 100644
--- a/drivers/spi/fsl_qspi.c
+++ b/drivers/spi/fsl_qspi.c
@@ -14,7 +14,11 @@
#include "fsl_qspi.h"
#define RX_BUFFER_SIZE 0x80
+#ifdef CONFIG_MX6SX
+#define TX_BUFFER_SIZE 0x200
+#else
#define TX_BUFFER_SIZE 0x40
+#endif
#define OFFSET_BITS_MASK 0x00ffffff
@@ -52,11 +56,19 @@
#endif
static unsigned long spi_bases[] = {
+#ifdef CONFIG_MX6SX
+ CONFIG_QSPI_BASE,
+#else
QSPI0_BASE_ADDR,
+#endif
};
static unsigned long amba_bases[] = {
+#ifdef CONFIG_MX6SX
+ CONFIG_QSPI_MEMMAP_BASE,
+#else
QSPI0_AMBA_BASE,
+#endif
};
struct fsl_qspi {
@@ -157,8 +169,14 @@ static void qspi_set_lut(struct fsl_qspi *qspi)
qspi_write32(®s->lut[lut_base], OPRND0(OPCODE_PP_4B) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+#ifdef CONFIG_MX6SX
+ /* Use IDATSZ in IPCR to determine the size */
+ qspi_write32(®s->lut[lut_base + 1], OPRND0(0) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
+#else
qspi_write32(®s->lut[lut_base + 1], OPRND0(TX_BUFFER_SIZE) |
PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
+#endif
qspi_write32(®s->lut[lut_base + 2], 0);
qspi_write32(®s->lut[lut_base + 3], 0);
@@ -191,6 +209,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
if (bus >= ARRAY_SIZE(spi_bases))
return NULL;
+#ifdef CONFIG_MX6SX
+ if (cs > 1)
+ return NULL;
+#endif
qspi = spi_alloc_slave(struct fsl_qspi, bus, cs);
if (!qspi)
@@ -215,6 +237,14 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
qspi_write32(®s->sfb1ad, total_size | qspi->amba_base);
qspi_write32(®s->sfb2ad, total_size | qspi->amba_base);
+#ifdef CONFIG_MX6SX
+ /*
+ * According to cs, change the amba_base to choose the flashes
+ * bus:cs 0:0--A1, 0:1--B1
+ */
+ qspi->amba_base = qspi->amba_base + cs * FSL_QSPI_FLASH_SIZE;
+#endif
+
qspi_set_lut(qspi);
smpr_val = qspi_read32(®s->smpr);
diff --git a/include/configs/mx6sxsabresd.h b/include/configs/mx6sxsabresd.h
index 1eda65e..00031ec 100644
--- a/include/configs/mx6sxsabresd.h
+++ b/include/configs/mx6sxsabresd.h
@@ -201,6 +201,20 @@
/* FLASH and environment organization */
#define CONFIG_SYS_NO_FLASH
+#define CONFIG_FSL_QSPI
+
+#ifdef CONFIG_FSL_QSPI
+#define CONFIG_CMD_SF
+#define CONFIG_SPI_FLASH
+#define CONFIG_SPI_FLASH_SPANSION
+#define CONFIG_SPI_FLASH_STMICRO
+#define CONFIG_SYS_FSL_QSPI_LE
+#define CONFIG_QSPI_BASE QSPI2_BASE_ADDR
+#define CONFIG_QSPI_MEMMAP_BASE QSPI2_ARB_BASE_ADDR
+#define FSL_QSPI_FLASH_SIZE SZ_16M
+#define FSL_QSPI_FLASH_NUM 2
+#endif
+
#define CONFIG_ENV_OFFSET (6 * SZ_64K)
#define CONFIG_ENV_SIZE SZ_8K
#define CONFIG_ENV_IS_IN_MMC
--
1.8.4
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