arm:mx6sx add QSPI support

Add QSPI support for mx6solox.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>

arch/arm/cpu/armv7/mx6/clock.c

@@ -434,6 +434,56 @@ 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)
 {

arch/arm/include/asm/arch-mx6/clock.h

@@ -67,5 +67,6 @@ 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);
 void enable_thermal_clk(void);
 #endif /* __ASM_ARCH_CLOCK_H */

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 QSPI0_AMBA_BASE                0x60000000
-#define QSPI1_ARB_END_ADDR              0x6FFFFFFF
+#define QSPI0_AMBA_END                 0x6FFFFFFF
-#define QSPI2_ARB_BASE_ADDR             0x70000000
+#define QSPI1_AMBA_BASE                0x70000000
-#define QSPI2_ARB_END_ADDR              0x7FFFFFFF
+#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 QSPI0_BASE_ADDR             (AIPS2_OFF_BASE_ADDR + 0x60000)
-#define QSPI2_BASE_ADDR             (AIPS2_OFF_BASE_ADDR + 0x64000)
+#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)

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(&regs->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(&regs->lut[lut_base + 1], OPRND0(0) |
+		     PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
+#else
 	qspi_write32(&regs->lut[lut_base + 1], OPRND0(TX_BUFFER_SIZE) |
 		PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
+#endif
 	qspi_write32(&regs->lut[lut_base + 2], 0);
 	qspi_write32(&regs->lut[lut_base + 3], 0);