[U-Boot] [PATCH v3 3/4] arm:mx6sx add QSPI support
Peng Fan
Peng.Fan at freescale.com
Tue Oct 14 08:06:38 CEST 2014
Add QSPI support for mx6solox.
Signed-off-by: Peng Fan <Peng.Fan at freescale.com>
---
Changelog v3:
none
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 | 1 +
arch/arm/include/asm/arch-mx6/imx-regs.h | 12 ++++----
drivers/spi/fsl_qspi.c | 19 ++++++++++++
4 files changed, 76 insertions(+), 6 deletions(-)
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index d200531..d11f98e 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -430,6 +430,56 @@ 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 3c58a0a..4eb5ba4 100644
--- a/arch/arm/include/asm/arch-mx6/clock.h
+++ b/arch/arm/include/asm/arch-mx6/clock.h
@@ -66,4 +66,5 @@ int enable_spi_clk(unsigned char enable, unsigned spi_num);
void enable_ipu_clock(void);
int enable_fec_anatop_clock(enum enet_freq freq);
void enable_enet_clk(unsigned char enable);
+void enable_qspi_clk(int qspi_num);
#endif /* __ASM_ARCH_CLOCK_H */
diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h
index a159309..5d07904 100644
--- a/arch/arm/include/asm/arch-mx6/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx6/imx-regs.h
@@ -92,10 +92,10 @@
#define AIPS3_END_ADDR 0x022FFFFF
#define WEIM_ARB_BASE_ADDR 0x50000000
#define WEIM_ARB_END_ADDR 0x57FFFFFF
-#define QSPI1_ARB_BASE_ADDR 0x60000000
-#define QSPI1_ARB_END_ADDR 0x6FFFFFFF
-#define QSPI2_ARB_BASE_ADDR 0x70000000
-#define QSPI2_ARB_END_ADDR 0x7FFFFFFF
+#define QSPI0_AMBA_BASE 0x60000000
+#define QSPI0_AMBA_END 0x6FFFFFFF
+#define QSPI1_AMBA_BASE 0x70000000
+#define QSPI1_AMBA_END 0x7FFFFFFF
#else
#define SATA_ARB_BASE_ADDR 0x02200000
#define SATA_ARB_END_ADDR 0x02203FFF
@@ -262,8 +262,8 @@
#define AUDMUX_BASE_ADDR (AIPS2_OFF_BASE_ADDR + 0x58000)
#ifdef CONFIG_MX6SX
#define SAI2_BASE_ADDR (AIPS2_OFF_BASE_ADDR + 0x5C000)
-#define QSPI1_BASE_ADDR (AIPS2_OFF_BASE_ADDR + 0x60000)
-#define QSPI2_BASE_ADDR (AIPS2_OFF_BASE_ADDR + 0x64000)
+#define QSPI0_BASE_ADDR (AIPS2_OFF_BASE_ADDR + 0x60000)
+#define QSPI1_BASE_ADDR (AIPS2_OFF_BASE_ADDR + 0x64000)
#else
#define MIPI_CSI2_BASE_ADDR (AIPS2_OFF_BASE_ADDR + 0x5C000)
#define MIPI_DSI_BASE_ADDR (AIPS2_OFF_BASE_ADDR + 0x60000)
diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c
index eae2f3a..e9c45de 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
@@ -53,10 +57,16 @@
static unsigned long spi_bases[] = {
QSPI0_BASE_ADDR,
+#ifdef CONFIG_MX6SX
+ QSPI1_BASE_ADDR,
+#endif
};
static unsigned long amba_bases[] = {
QSPI0_AMBA_BASE,
+#ifdef CONFIG_MX6SX
+ QSPI1_AMBA_BASE,
+#endif
};
struct fsl_qspi {
@@ -159,8 +169,17 @@ static void qspi_set_lut(struct fsl_qspi *qspi)
qspi_write32(®s->lut[lut_base], OPRND0(QSPI_CMD_PP_4B) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+#ifdef CONFIG_MX6SX
+ /*
+ * To MX6SX, OPRND0(TX_BUFFER_SIZE) can not work correctly.
+ * So, Use IDATSZ in IPCR to determine the size and here set 0.
+ */
+ 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);
--
1.8.4
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