Add QSPI support for mx6solox.
Signed-off-by: Peng Fan <peng....@freescale.com>
---
Changelog v2:
Take Fabio's suggestion, split soc code and board code into two patches.
arch/arm/cpu/armv7/mx6/clock.c | 50 +++++++++++++++++++++++++++++++++++
arch/arm/include/asm/arch-mx6/clock.h | 3 +++
drivers/spi/fsl_qspi.c | 29 ++++++++++++++++++++
3 files changed, 82 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/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c
index ba20bef..7c8d065 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);
@@ -192,6 +210,12 @@ struct spi_slave *spi_setup_slave(unsigned int bus,
unsigned int cs,
if (bus >= ARRAY_SIZE(spi_bases))
return NULL;
+#ifdef CONFIG_MX6SX
+ /* cs should be 0 - (FSL_QSPI_FLASH_NUM - 1) */
+ if (cs >= FSL_QSPI_FLASH_NUM)
+ return NULL;
+#endif
+
qspi = spi_alloc_slave(struct fsl_qspi, bus, cs);
if (!qspi)
return NULL;
@@ -215,6 +239,11 @@ 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 flash */
+ qspi->amba_base = qspi->amba_base + cs * FSL_QSPI_FLASH_SIZE;
+#endif
+
qspi_set_lut(qspi);
smpr_val = qspi_read32(®s->smpr);
--
1.8.4
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