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authorFabio Estevam <fabio.estevam@freescale.com>2014-08-25 14:26:45 -0300
committerStefano Babic <sbabic@denx.de>2014-09-09 17:24:49 +0200
commit1b8ad74a6f8cea55a727dc4b399baac46d0daef1 (patch)
tree0553356fd461dd173b74c9108577b60c997161af /arch
parentac17dcf653138cd0e521142fdfdfdff8027d3a04 (diff)
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pcie_imx: Add mx6solox support
Let PCI on mx6solox also be supported. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Marek Vasut <marex@denx.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/cpu/armv7/mx6/clock.c17
-rw-r--r--arch/arm/include/asm/arch-mx6/iomux.h9
2 files changed, 22 insertions, 4 deletions
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index a861e65..52136f7 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -599,6 +599,7 @@ int enable_pcie_clock(void)
struct anatop_regs *anatop_regs =
(struct anatop_regs *)ANATOP_BASE_ADDR;
struct mxc_ccm_reg *ccm_regs = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+ u32 lvds1_clk_sel;
/*
* Here be dragons!
@@ -608,17 +609,25 @@ int enable_pcie_clock(void)
* marked as ANATOP_MISC1 is actually documented in the PMU section
* of the datasheet as PMU_MISC1.
*
- * Switch LVDS clock source to SATA (0xb), disable clock INPUT and
- * enable clock OUTPUT. This is important for PCI express link that
- * is clocked from the i.MX6.
+ * Switch LVDS clock source to SATA (0xb) on mx6q/dl or PCI (0xa) on
+ * mx6sx, disable clock INPUT and enable clock OUTPUT. This is important
+ * for PCI express link that is clocked from the i.MX6.
*/
#define ANADIG_ANA_MISC1_LVDSCLK1_IBEN (1 << 12)
#define ANADIG_ANA_MISC1_LVDSCLK1_OBEN (1 << 10)
#define ANADIG_ANA_MISC1_LVDS1_CLK_SEL_MASK 0x0000001F
+#define ANADIG_ANA_MISC1_LVDS1_CLK_SEL_PCIE_REF 0xa
+#define ANADIG_ANA_MISC1_LVDS1_CLK_SEL_SATA_REF 0xb
+
+ if (is_cpu_type(MXC_CPU_MX6SX))
+ lvds1_clk_sel = ANADIG_ANA_MISC1_LVDS1_CLK_SEL_PCIE_REF;
+ else
+ lvds1_clk_sel = ANADIG_ANA_MISC1_LVDS1_CLK_SEL_SATA_REF;
+
clrsetbits_le32(&anatop_regs->ana_misc1,
ANADIG_ANA_MISC1_LVDSCLK1_IBEN |
ANADIG_ANA_MISC1_LVDS1_CLK_SEL_MASK,
- ANADIG_ANA_MISC1_LVDSCLK1_OBEN | 0xb);
+ ANADIG_ANA_MISC1_LVDSCLK1_OBEN | lvds1_clk_sel);
/* PCIe reference clock sourced from AXI. */
clrbits_le32(&ccm_regs->cbcmr, MXC_CCM_CBCMR_PCIE_AXI_CLK_SEL);
diff --git a/arch/arm/include/asm/arch-mx6/iomux.h b/arch/arm/include/asm/arch-mx6/iomux.h
index f54db69..9b3a91f 100644
--- a/arch/arm/include/asm/arch-mx6/iomux.h
+++ b/arch/arm/include/asm/arch-mx6/iomux.h
@@ -19,6 +19,12 @@
#define IOMUXC_GPR1_TEST_POWERDOWN (1 << 18)
/*
+ * IOMUXC_GPR5 bit fields
+ */
+#define IOMUXC_GPR5_PCIE_BTNRST (1 << 19)
+#define IOMUXC_GPR5_PCIE_PERST (1 << 18)
+
+/*
* IOMUXC_GPR8 bit fields
*/
#define IOMUXC_GPR8_PCS_TX_DEEMPH_GEN1_MASK (0x3f << 0)
@@ -35,12 +41,15 @@
/*
* IOMUXC_GPR12 bit fields
*/
+#define IOMUXC_GPR12_RX_EQ_2 (0x2 << 0)
+#define IOMUXC_GPR12_RX_EQ_MASK (0x7 << 0)
#define IOMUXC_GPR12_LOS_LEVEL_9 (0x9 << 4)
#define IOMUXC_GPR12_LOS_LEVEL_MASK (0x1f << 4)
#define IOMUXC_GPR12_APPS_LTSSM_ENABLE (1 << 10)
#define IOMUXC_GPR12_DEVICE_TYPE_EP (0x0 << 12)
#define IOMUXC_GPR12_DEVICE_TYPE_RC (0x4 << 12)
#define IOMUXC_GPR12_DEVICE_TYPE_MASK (0xf << 12)
+#define IOMUXC_GPR12_TEST_POWERDOWN (1 << 30)
/*
* IOMUXC_GPR13 bit fields