From: Simon Glass <sjg@chromium.org>
Date: Sun, 17 Jan 2016 23:11:12 +0000 (-0700)
Subject: x86: ivybridge: Move more init to the probe() function
X-Git-Tag: v2016.03-rc1~126
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fe40bd4d8f62637aac0d2b3e6195d56dc96b1342;p=platform%2Fkernel%2Fu-boot.git

x86: ivybridge: Move more init to the probe() function

Move SPI and port80 init to lpc_early_init(), called from the LPC's probe()
method.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---

diff --git a/arch/x86/cpu/ivybridge/cpu.c b/arch/x86/cpu/ivybridge/cpu.c
index 4c6ffb249d..1e6f656685 100644
--- a/arch/x86/cpu/ivybridge/cpu.c
+++ b/arch/x86/cpu/ivybridge/cpu.c
@@ -30,26 +30,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-static void enable_port80_on_lpc(struct pci_controller *hose, pci_dev_t dev)
-{
-	/* Enable port 80 POST on LPC */
-	pci_hose_write_config_dword(hose, dev, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
-	clrbits_le32(RCB_REG(GCS), 4);
-}
-
-/*
- * Enable Prefetching and Caching.
- */
-static void enable_spi_prefetch(struct pci_controller *hose, pci_dev_t dev)
-{
-	u8 reg8;
-
-	pci_hose_read_config_byte(hose, dev, 0xdc, &reg8);
-	reg8 &= ~(3 << 2);
-	reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
-	pci_hose_write_config_byte(hose, dev, 0xdc, reg8);
-}
-
 static int set_flex_ratio_to_tdp_nominal(void)
 {
 	msr_t flex_ratio, msr;
@@ -99,22 +79,6 @@ static int set_flex_ratio_to_tdp_nominal(void)
 	return -EINVAL;
 }
 
-static void set_spi_speed(void)
-{
-	u32 fdod;
-
-	/* Observe SPI Descriptor Component Section 0 */
-	writel(0x1000, RCB_REG(SPI_DESC_COMP0));
-
-	/* Extract the1 Write/Erase SPI Frequency from descriptor */
-	fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
-	fdod >>= 24;
-	fdod &= 7;
-
-	/* Set Software Sequence frequency to match */
-	clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
-}
-
 int arch_cpu_init(void)
 {
 	post_code(POST_CPU_INIT);
@@ -143,13 +107,6 @@ int arch_cpu_init_dm(void)
 	if (!dev)
 		return -ENODEV;
 
-	enable_spi_prefetch(hose, PCH_LPC_DEV);
-
-	/* This is already done in start.S, but let's do it in C */
-	enable_port80_on_lpc(hose, PCH_LPC_DEV);
-
-	set_spi_speed();
-
 	/*
 	 * We should do as little as possible before the serial console is
 	 * up. Perhaps this should move to later. Our next lot of init
diff --git a/arch/x86/cpu/ivybridge/lpc.c b/arch/x86/cpu/ivybridge/lpc.c
index 9d089c75bf..9dad9e4ee9 100644
--- a/arch/x86/cpu/ivybridge/lpc.c
+++ b/arch/x86/cpu/ivybridge/lpc.c
@@ -454,6 +454,42 @@ static void pch_fixups(pci_dev_t dev)
 	setbits_le32(RCB_REG(0x21a8), 0x3);
 }
 
+/*
+ * Enable Prefetching and Caching.
+ */
+static void enable_spi_prefetch(struct udevice *pch)
+{
+	u8 reg8;
+
+	dm_pci_read_config8(pch, 0xdc, &reg8);
+	reg8 &= ~(3 << 2);
+	reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
+	dm_pci_write_config8(pch, 0xdc, reg8);
+}
+
+static void enable_port80_on_lpc(struct udevice *pch)
+{
+	/* Enable port 80 POST on LPC */
+	dm_pci_write_config32(pch, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
+	clrbits_le32(RCB_REG(GCS), 4);
+}
+
+static void set_spi_speed(void)
+{
+	u32 fdod;
+
+	/* Observe SPI Descriptor Component Section 0 */
+	writel(0x1000, RCB_REG(SPI_DESC_COMP0));
+
+	/* Extract the1 Write/Erase SPI Frequency from descriptor */
+	fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
+	fdod >>= 24;
+	fdod &= 7;
+
+	/* Set Software Sequence frequency to match */
+	clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
+}
+
 /**
  * lpc_early_init() - set up LPC serial ports and other early things
  *
@@ -492,6 +528,13 @@ static int lpc_early_init(struct udevice *dev)
 		dm_pci_write_config32(dev->parent, LPC_GENX_DEC(i), reg);
 	}
 
+	enable_spi_prefetch(dev->parent);
+
+	/* This is already done in start.S, but let's do it in C */
+	enable_port80_on_lpc(dev->parent);
+
+	set_spi_speed();
+
 	return 0;
 }