mpc83xx: MPC837XERDB: Add PCIe support

On MPC8377E-RDB and MPC8378E-RDB boards we have PCIe and mini-PCIe
slots. Let's support them.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

board/freescale/mpc837xerdb/pci.c

@@ -13,6 +13,7 @@
 #include <common.h>
 #include <mpc83xx.h>
 #include <pci.h>
+#include <asm/io.h>
 
 #if defined(CONFIG_PCI)
 static struct pci_region pci_regions[] = {
@@ -36,12 +37,46 @@ static struct pci_region pci_regions[] = {
 	}
 };
 
+static struct pci_region pcie_regions_0[] = {
+	{
+		.bus_start = CONFIG_SYS_PCIE1_MEM_BASE,
+		.phys_start = CONFIG_SYS_PCIE1_MEM_PHYS,
+		.size = CONFIG_SYS_PCIE1_MEM_SIZE,
+		.flags = PCI_REGION_MEM,
+	},
+	{
+		.bus_start = CONFIG_SYS_PCIE1_IO_BASE,
+		.phys_start = CONFIG_SYS_PCIE1_IO_PHYS,
+		.size = CONFIG_SYS_PCIE1_IO_SIZE,
+		.flags = PCI_REGION_IO,
+	},
+};
+
+static struct pci_region pcie_regions_1[] = {
+	{
+		.bus_start = CONFIG_SYS_PCIE2_MEM_BASE,
+		.phys_start = CONFIG_SYS_PCIE2_MEM_PHYS,
+		.size = CONFIG_SYS_PCIE2_MEM_SIZE,
+		.flags = PCI_REGION_MEM,
+	},
+	{
+		.bus_start = CONFIG_SYS_PCIE2_IO_BASE,
+		.phys_start = CONFIG_SYS_PCIE2_IO_PHYS,
+		.size = CONFIG_SYS_PCIE2_IO_SIZE,
+		.flags = PCI_REGION_IO,
+	},
+};
+
 void pci_init_board(void)
 {
 	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
+	volatile sysconf83xx_t *sysconf = &immr->sysconf;
 	volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
 	volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
+	volatile law83xx_t *pcie_law = sysconf->pcielaw;
 	struct pci_region *reg[] = { pci_regions };
+	struct pci_region *pcie_reg[] = { pcie_regions_0, pcie_regions_1, };
+	u32 spridr = in_be32(&immr->sysconf.spridr);
 
 	/* Enable all 5 PCI_CLK_OUTPUTS */
 	clk->occr |= 0xf8000000;
@@ -55,5 +90,27 @@ void pci_init_board(void)
 	pci_law[1].ar = LBLAWAR_EN | LBLAWAR_1MB;
 
 	mpc83xx_pci_init(1, reg, 0);
+
+	/* There is no PEX in MPC8379 parts. */
+	if (PARTID_NO_E(spridr) == SPR_8379)
+		return;
+
+	/* Configure the clock for PCIE controller */
+	clrsetbits_be32(&clk->sccr, SCCR_PCIEXP1CM | SCCR_PCIEXP2CM,
+				    SCCR_PCIEXP1CM_1 | SCCR_PCIEXP2CM_1);
+
+	/* Deassert the resets in the control register */
+	out_be32(&sysconf->pecr1, 0xE0008000);
+	out_be32(&sysconf->pecr2, 0xE0008000);
+	udelay(2000);
+
+	/* Configure PCI Express Local Access Windows */
+	out_be32(&pcie_law[0].bar, CONFIG_SYS_PCIE1_BASE & LAWBAR_BAR);
+	out_be32(&pcie_law[0].ar, LBLAWAR_EN | LBLAWAR_512MB);
+
+	out_be32(&pcie_law[1].bar, CONFIG_SYS_PCIE2_BASE & LAWBAR_BAR);
+	out_be32(&pcie_law[1].ar, LBLAWAR_EN | LBLAWAR_512MB);
+
+	mpc83xx_pcie_init(2, pcie_reg, 0);
 }
 #endif	/* CONFIG_PCI */

include/configs/MPC837XERDB.h

@@ -49,6 +49,7 @@
 #else
 #define CONFIG_83XX_CLKIN	66666667 /* in Hz */
 #define CONFIG_83XX_GENERIC_PCI	1
+#define CONFIG_83XX_GENERIC_PCIE	1
 #endif
 
 #ifndef CONFIG_SYS_CLK_FREQ
@@ -375,6 +376,26 @@
 #define CONFIG_SYS_PCI_SLV_MEM_BUS	0x00000000
 #define CONFIG_SYS_PCI_SLV_MEM_SIZE	0x80000000
 
+#define CONFIG_SYS_PCIE1_BASE		0xA0000000
+#define CONFIG_SYS_PCIE1_CFG_BASE	0xA0000000
+#define CONFIG_SYS_PCIE1_CFG_SIZE	0x08000000
+#define CONFIG_SYS_PCIE1_MEM_BASE	0xA8000000
+#define CONFIG_SYS_PCIE1_MEM_PHYS	0xA8000000
+#define CONFIG_SYS_PCIE1_MEM_SIZE	0x10000000
+#define CONFIG_SYS_PCIE1_IO_BASE	0x00000000
+#define CONFIG_SYS_PCIE1_IO_PHYS	0xB8000000
+#define CONFIG_SYS_PCIE1_IO_SIZE	0x00800000
+
+#define CONFIG_SYS_PCIE2_BASE		0xC0000000
+#define CONFIG_SYS_PCIE2_CFG_BASE	0xC0000000
+#define CONFIG_SYS_PCIE2_CFG_SIZE	0x08000000
+#define CONFIG_SYS_PCIE2_MEM_BASE	0xC8000000
+#define CONFIG_SYS_PCIE2_MEM_PHYS	0xC8000000
+#define CONFIG_SYS_PCIE2_MEM_SIZE	0x10000000
+#define CONFIG_SYS_PCIE2_IO_BASE	0x00000000
+#define CONFIG_SYS_PCIE2_IO_PHYS	0xD8000000
+#define CONFIG_SYS_PCIE2_IO_SIZE	0x00800000
+
 #ifdef CONFIG_PCI
 #define CONFIG_NET_MULTI
 #define CONFIG_PCI_PNP		/* do pci plug-and-play */