Added PCI support for MPC8349ADS board

Patch by Kumar Gala 11 Jan 2006

1 files changed, 387 insertions, 0 deletions

diff --git a/board/mpc8349ads/pci.c b/board/mpc8349ads/pci.c
new file mode 100644
index 0000000..f3c7f53
--- /dev/null
+++ b/board/mpc8349ads/pci.c
@@ -0,0 +1,387 @@
+/*
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <asm/mmu.h>
+#include <common.h>
+#include <asm/global_data.h>
+#include <pci.h>
+#include <asm/mpc8349_pci.h>
+#include <i2c.h>
+
+#ifdef CONFIG_PCI
+
+/* System RAM mapped to PCI space */
+#define CONFIG_PCI_SYS_MEM_BUS	CFG_SDRAM_BASE
+#define CONFIG_PCI_SYS_MEM_PHYS	CFG_SDRAM_BASE
+
+#ifndef CONFIG_PCI_PNP
+static struct pci_config_table pci_mpc83xxads_config_table[] = {
+	{PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+	 PCI_IDSEL_NUMBER, PCI_ANY_ID,
+ 	 pci_cfgfunc_config_device, {PCI_ENET0_IOADDR,
+				     PCI_ENET0_MEMADDR,
+				     PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
+		}
+	},
+	{}
+};
+#endif
+
+static struct pci_controller pci_hose[] = {
+       {
+#ifndef CONFIG_PCI_PNP
+       config_table:pci_mpc83xxads_config_table,
+#endif
+       },
+       {
+#ifndef CONFIG_PCI_PNP
+       config_table:pci_mpc83xxads_config_table,
+#endif
+       }
+};
+
+/**************************************************************************
+ *
+ * pib_init() -- initialize the PCA9555PW IO expander on the PIB board
+ *
+ */
+void
+pib_init(void)
+{
+	u8 val8;
+	/*
+	 * Assign PIB PMC slot to desired PCI bus
+	 */
+	mpc8349_i2c = (i2c_t*)(CFG_IMMRBAR + CFG_I2C2_OFFSET);
+	i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+	val8 = 0;
+	i2c_write(0x23, 0x6, 1, &val8, 1);
+	i2c_write(0x23, 0x7, 1, &val8, 1);
+	val8 = 0xff;
+	i2c_write(0x23, 0x2, 1, &val8, 1);
+	i2c_write(0x23, 0x3, 1, &val8, 1);
+
+	val8 = 0;
+	i2c_write(0x26, 0x6, 1, &val8, 1);
+	val8 = 0x34;
+	i2c_write(0x26, 0x7, 1, &val8, 1);
+#if defined(PCI_64BIT)
+	val8 = 0xf4;	/* PMC2:PCI1/64-bit */
+#elif defined(PCI_ALL_PCI1)
+	val8 = 0xf3;	/* PMC1:PCI1 PMC2:PCI1 PMC3:PCI1 */
+#elif defined(PCI_ONE_PCI1)
+	val8 = 0xf9;	/* PMC1:PCI1 PMC2:PCI2 PMC3:PCI2 */
+#else
+	val8 = 0xf5;	/* PMC1:PCI1 PMC2:PCI1 PMC3:PCI2 */
+#endif
+	i2c_write(0x26, 0x2, 1, &val8, 1);
+	val8 = 0xff;
+	i2c_write(0x26, 0x3, 1, &val8, 1);
+	val8 = 0;
+	i2c_write(0x27, 0x6, 1, &val8, 1);
+	i2c_write(0x27, 0x7, 1, &val8, 1);
+	val8 = 0xff;
+	i2c_write(0x27, 0x2, 1, &val8, 1);
+	val8 = 0xef;
+	i2c_write(0x27, 0x3, 1, &val8, 1);
+	asm("eieio");
+
+#if defined(PCI_64BIT)
+	printf("PCI1: 64-bit on PMC2\n");
+#elif defined(PCI_ALL_PCI1)
+	printf("PCI1: 32-bit on PMC1, PMC2, PMC3\n");
+#elif defined(PCI_ONE_PCI1)
+	printf("PCI1: 32-bit on PMC1\n");
+	printf("PCI2: 32-bit on PMC2, PMC3\n");
+#else
+	printf("PCI1: 32-bit on PMC1, PMC2\n");
+	printf("PCI2: 32-bit on PMC3\n");
+#endif
+}
+
+/**************************************************************************
+ * pci_init_board()
+ *
+ * NOTICE: PCI2 is not currently supported
+ *
+ */
+void
+pci_init_board(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	volatile immap_t *	immr;
+	volatile clk8349_t *	clk;
+	volatile law8349_t *	pci_law;
+	volatile pot8349_t *	pci_pot;
+	volatile pcictrl8349_t *	pci_ctrl;
+	volatile pciconf8349_t *	pci_conf;
+	u16 reg16;
+	u32 reg32;
+	struct	pci_controller * hose;
+
+	immr = (immap_t *)CFG_IMMRBAR;
+	clk = (clk8349_t *)&immr->clk;
+	pci_law = immr->sysconf.pcilaw;
+	pci_pot = immr->ios.pot;
+	pci_ctrl = immr->pci_ctrl;
+	pci_conf = immr->pci_conf;
+
+	hose = &pci_hose[0];
+
+	pib_init();
+
+	/*
+	 * Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
+	 */
+
+	reg32 = clk->occr;
+	udelay(2000);
+	clk->occr = 0xff000000;
+	udelay(2000);
+
+	/*
+	 * Release PCI RST Output signal
+	 */
+	pci_ctrl[0].gcr = 0;
+	udelay(2000);
+	pci_ctrl[0].gcr = 1;
+
+#ifdef CONFIG_MPC83XX_PCI2
+	pci_ctrl[1].gcr = 0;
+	udelay(2000);
+	pci_ctrl[1].gcr = 1;
+#endif
+
+	/* We need to wait at least a 1sec based on PCI specs */
+	{
+		int i;
+
+		for (i = 0; i < 1000; ++i)
+			udelay (1000);
+	}
+
+	/*
+	 * Configure PCI Local Access Windows
+	 */
+	pci_law[0].bar = CFG_PCI1_MEM_PHYS & LAWBAR_BAR;
+	pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
+
+	pci_law[1].bar = CFG_PCI1_IO_PHYS & LAWBAR_BAR;
+	pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_32M;
+
+	/*
+	 * Configure PCI Outbound Translation Windows
+	 */
+
+	/* PCI1 mem space - prefetch */
+	pci_pot[0].potar = (CFG_PCI1_MEM_BASE >> 12) & POTAR_TA_MASK;
+	pci_pot[0].pobar = (CFG_PCI1_MEM_PHYS >> 12) & POBAR_BA_MASK;
+	pci_pot[0].pocmr = POCMR_EN | POCMR_PREFETCH_EN | (POCMR_CM_256M & POCMR_CM_MASK);
+
+	/* PCI1 IO space */
+	pci_pot[1].potar = (CFG_PCI1_IO_BASE >> 12) & POTAR_TA_MASK;
+	pci_pot[1].pobar = (CFG_PCI1_IO_PHYS >> 12) & POBAR_BA_MASK;
+	pci_pot[1].pocmr = POCMR_EN | POCMR_IO | (POCMR_CM_16M & POCMR_CM_MASK);
+
+	/* PCI1 mmio - non-prefetch mem space */
+	pci_pot[2].potar = (CFG_PCI1_MMIO_BASE >> 12) & POTAR_TA_MASK;
+	pci_pot[2].pobar = (CFG_PCI1_MMIO_PHYS >> 12) & POBAR_BA_MASK;
+	pci_pot[2].pocmr = POCMR_EN | (POCMR_CM_256M & POCMR_CM_MASK);
+
+	/*
+	 * Configure PCI Inbound Translation Windows
+	 */
+
+	/* we need RAM mapped to PCI space for the devices to
+	 * access main memory */
+	pci_ctrl[0].pitar1 = 0x0;
+	pci_ctrl[0].pibar1 = 0x0;
+	pci_ctrl[0].piebar1 = 0x0;
+	pci_ctrl[0].piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size) - 1);
+
+	hose->first_busno = 0;
+	hose->last_busno = 0xff;
+
+	/* PCI memory prefetch space */
+	pci_set_region(hose->regions + 0,
+		       CFG_PCI1_MEM_BASE,
+		       CFG_PCI1_MEM_PHYS,
+		       CFG_PCI1_MEM_SIZE,
+		       PCI_REGION_MEM|PCI_REGION_PREFETCH);
+
+	/* PCI memory space */
+	pci_set_region(hose->regions + 1,
+		       CFG_PCI1_MMIO_BASE,
+		       CFG_PCI1_MMIO_PHYS,
+		       CFG_PCI1_MMIO_SIZE,
+		       PCI_REGION_MEM);
+
+	/* PCI IO space */
+	pci_set_region(hose->regions + 2,
+		       CFG_PCI1_IO_BASE,
+		       CFG_PCI1_IO_PHYS,
+		       CFG_PCI1_IO_SIZE,
+		       PCI_REGION_IO);
+
+	/* System memory space */
+	pci_set_region(hose->regions + 3,
+		       CONFIG_PCI_SYS_MEM_BUS,
+                       CONFIG_PCI_SYS_MEM_PHYS,
+                       gd->ram_size,
+                       PCI_REGION_MEM | PCI_REGION_MEMORY);
+
+	hose->region_count = 4;
+
+	pci_setup_indirect(hose,
+			   (CFG_IMMRBAR+0x8300),
+			   (CFG_IMMRBAR+0x8304));
+
+	pci_register_hose(hose);
+
+	/*
+	 * Write to Command register
+	 */
+	reg16 = 0xff;
+	pci_hose_read_config_word (hose, PCI_BDF(0,0,0), PCI_COMMAND,
+					&reg16);
+	reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_COMMAND,
+					reg16);
+
+	/*
+	 * Clear non-reserved bits in status register.
+	 */
+	pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_STATUS,
+					0xffff);
+	pci_hose_write_config_byte(hose, PCI_BDF(0,0,0), PCI_LATENCY_TIMER,
+					0x80);
+	pci_hose_write_config_byte(hose, PCI_BDF(0,0,0), PCI_CACHE_LINE_SIZE,
+					0x08);
+
+#ifdef CONFIG_PCI_SCAN_SHOW
+	printf("PCI:   Bus Dev VenId DevId Class Int\n");
+#endif
+	/*
+	 * Hose scan.
+	 */
+	hose->last_busno = pci_hose_scan(hose);
+
+#ifdef CONFIG_MPC83XX_PCI2
+	hose = &pci_hose[1];
+
+	/*
+	 * Configure PCI Outbound Translation Windows
+	 */
+
+	/* PCI2 mem space - prefetch */
+	pci_pot[3].potar = (CFG_PCI2_MEM_BASE >> 12) & POTAR_TA_MASK;
+	pci_pot[3].pobar = (CFG_PCI2_MEM_PHYS >> 12) & POBAR_BA_MASK;
+	pci_pot[3].pocmr = POCMR_EN | POCMR_PCI2 | POCMR_PREFETCH_EN | (POCMR_CM_256M & POCMR_CM_MASK);
+
+	/* PCI2 IO space */
+	pci_pot[4].potar = (CFG_PCI2_IO_BASE >> 12) & POTAR_TA_MASK;
+	pci_pot[4].pobar = (CFG_PCI2_IO_PHYS >> 12) & POBAR_BA_MASK;
+	pci_pot[4].pocmr = POCMR_EN | POCMR_PCI2 | POCMR_IO | (POCMR_CM_16M & POCMR_CM_MASK);
+
+	/* PCI2 mmio - non-prefetch mem space */
+	pci_pot[5].potar = (CFG_PCI2_MMIO_BASE >> 12) & POTAR_TA_MASK;
+	pci_pot[5].pobar = (CFG_PCI2_MMIO_PHYS >> 12) & POBAR_BA_MASK;
+	pci_pot[5].pocmr = POCMR_EN | POCMR_PCI2 | (POCMR_CM_256M & POCMR_CM_MASK);
+
+	/*
+	 * Configure PCI Inbound Translation Windows
+	 */
+
+	/* we need RAM mapped to PCI space for the devices to
+	 * access main memory */
+	pci_ctrl[1].pitar1 = 0x0;
+	pci_ctrl[1].pibar1 = 0x0;
+	pci_ctrl[1].piebar1 = 0x0;
+	pci_ctrl[1].piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size) - 1);
+
+	hose->first_busno = pci_hose[0].last_busno + 1;
+	hose->last_busno = 0xff;
+
+	/* PCI memory prefetch space */
+	pci_set_region(hose->regions + 0,
+		       CFG_PCI2_MEM_BASE,
+		       CFG_PCI2_MEM_PHYS,
+		       CFG_PCI2_MEM_SIZE,
+		       PCI_REGION_MEM|PCI_REGION_PREFETCH);
+
+	/* PCI memory space */
+	pci_set_region(hose->regions + 1,
+		       CFG_PCI2_MMIO_BASE,
+		       CFG_PCI2_MMIO_PHYS,
+		       CFG_PCI2_MMIO_SIZE,
+		       PCI_REGION_MEM);
+
+	/* PCI IO space */
+	pci_set_region(hose->regions + 2,
+		       CFG_PCI2_IO_BASE,
+		       CFG_PCI2_IO_PHYS,
+		       CFG_PCI2_IO_SIZE,
+		       PCI_REGION_IO);
+
+	/* System memory space */
+	pci_set_region(hose->regions + 3,
+		       CONFIG_PCI_SYS_MEM_BUS,
+                       CONFIG_PCI_SYS_MEM_PHYS,
+                       gd->ram_size,
+                       PCI_REGION_MEM | PCI_REGION_MEMORY);
+
+	hose->region_count = 4;
+
+	pci_setup_indirect(hose,
+			   (CFG_IMMRBAR+0x8380),
+			   (CFG_IMMRBAR+0x8384));
+
+	pci_register_hose(hose);
+
+	/*
+	 * Write to Command register
+	 */
+	reg16 = 0xff;
+	pci_hose_read_config_word (hose, PCI_BDF(0,0,0), PCI_COMMAND,
+					&reg16);
+	reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_COMMAND,
+					reg16);
+
+	/*
+	 * Clear non-reserved bits in status register.
+	 */
+	pci_hose_write_config_word(hose, PCI_BDF(0,0,0), PCI_STATUS,
+					0xffff);
+	pci_hose_write_config_byte(hose, PCI_BDF(0,0,0), PCI_LATENCY_TIMER,
+					0x80);
+	pci_hose_write_config_byte(hose, PCI_BDF(0,0,0), PCI_CACHE_LINE_SIZE,
+					0x08);
+
+	/*
+	 * Hose scan.
+	 */
+	hose->last_busno = pci_hose_scan(hose);
+#endif
+
+}
+#endif /* CONFIG_PCI */