Move arch/ppc to arch/powerpc

As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>

1 files changed, 241 insertions, 0 deletions

diff --git a/arch/powerpc/cpu/mpc83xx/pci.c b/arch/powerpc/cpu/mpc83xx/pci.c
new file mode 100644
index 0000000..a42b230
--- /dev/null
+++ b/arch/powerpc/cpu/mpc83xx/pci.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) Freescale Semiconductor, Inc. 2007
+ *
+ * Author: Scott Wood <scottwood@freescale.com>,
+ * with some bits from older board-specific PCI initialization.
+ *
+ * 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 <common.h>
+#include <pci.h>
+
+#if defined(CONFIG_OF_LIBFDT)
+#include <libfdt.h>
+#include <fdt_support.h>
+#endif
+
+#include <asm/mpc8349_pci.h>
+
+#define MAX_BUSES 2
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct pci_controller pci_hose[MAX_BUSES];
+static int pci_num_buses;
+
+static void pci_init_bus(int bus, struct pci_region *reg)
+{
+	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
+	volatile pot83xx_t *pot = immr->ios.pot;
+	volatile pcictrl83xx_t *pci_ctrl = &immr->pci_ctrl[bus];
+	struct pci_controller *hose = &pci_hose[bus];
+	u32 dev;
+	u16 reg16;
+	int i;
+
+	if (bus == 1)
+		pot += 3;
+
+	/* Setup outbound translation windows */
+	for (i = 0; i < 3; i++, reg++, pot++) {
+		if (reg->size == 0)
+			break;
+
+		hose->regions[i] = *reg;
+		hose->region_count++;
+
+		pot->potar = reg->bus_start >> 12;
+		pot->pobar = reg->phys_start >> 12;
+		pot->pocmr = ~(reg->size - 1) >> 12;
+
+		if (reg->flags & PCI_REGION_IO)
+			pot->pocmr |= POCMR_IO;
+#ifdef CONFIG_83XX_PCI_STREAMING
+		else if (reg->flags & PCI_REGION_PREFETCH)
+			pot->pocmr |= POCMR_SE;
+#endif
+
+		if (bus == 1)
+			pot->pocmr |= POCMR_DST;
+
+		pot->pocmr |= POCMR_EN;
+	}
+
+	/* Point inbound translation at RAM */
+	pci_ctrl->pitar1 = 0;
+	pci_ctrl->pibar1 = 0;
+	pci_ctrl->piebar1 = 0;
+	pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
+	                   PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size - 1));
+
+	i = hose->region_count++;
+	hose->regions[i].bus_start = 0;
+	hose->regions[i].phys_start = 0;
+	hose->regions[i].size = gd->ram_size;
+	hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_SYS_MEMORY;
+
+	hose->first_busno = pci_last_busno() + 1;
+	hose->last_busno = 0xff;
+
+	pci_setup_indirect(hose, CONFIG_SYS_IMMR + 0x8300 + bus * 0x80,
+	                         CONFIG_SYS_IMMR + 0x8304 + bus * 0x80);
+
+	pci_register_hose(hose);
+
+	/*
+	 * Write to Command register
+	 */
+	reg16 = 0xff;
+	dev = PCI_BDF(hose->first_busno, 0, 0);
+	pci_hose_read_config_word(hose, dev, PCI_COMMAND, &reg16);
+	reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
+
+	/*
+	 * Clear non-reserved bits in status register.
+	 */
+	pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
+	pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
+	pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
+
+#ifdef CONFIG_PCI_SCAN_SHOW
+	printf("PCI:   Bus Dev VenId DevId Class Int\n");
+#endif
+#ifndef CONFIG_PCISLAVE
+	/*
+	 * Hose scan.
+	 */
+	hose->last_busno = pci_hose_scan(hose);
+#endif
+}
+
+/*
+ * The caller must have already set OCCR, and the PCI_LAW BARs
+ * must have been set to cover all of the requested regions.
+ *
+ * If fewer than three regions are requested, then the region
+ * list is terminated with a region of size 0.
+ */
+void mpc83xx_pci_init(int num_buses, struct pci_region **reg, int warmboot)
+{
+	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
+	int i;
+
+	if (num_buses > MAX_BUSES) {
+		printf("%d PCI buses requsted, %d supported\n",
+		       num_buses, MAX_BUSES);
+
+		num_buses = MAX_BUSES;
+	}
+
+	pci_num_buses = num_buses;
+
+	/*
+	 * Release PCI RST Output signal.
+	 * Power on to RST high must be at least 100 ms as per PCI spec.
+	 * On warm boots only 1 ms is required.
+	 */
+	udelay(warmboot ? 1000 : 100000);
+
+	for (i = 0; i < num_buses; i++)
+		immr->pci_ctrl[i].gcr = 1;
+
+	/*
+	 * RST high to first config access must be at least 2^25 cycles
+	 * as per PCI spec.  This could be cut in half if we know we're
+	 * running at 66MHz.  This could be insufficiently long if we're
+	 * running the PCI bus at significantly less than 33MHz.
+	 */
+	udelay(1020000);
+
+	for (i = 0; i < num_buses; i++)
+		pci_init_bus(i, reg[i]);
+}
+
+#ifdef CONFIG_PCISLAVE
+
+#define PCI_FUNCTION_CONFIG	0x44
+#define PCI_FUNCTION_CFG_LOCK	0x20
+
+/*
+ * Unlock the configuration bit so that the host system can begin booting
+ *
+ * This should be used after you have:
+ * 1) Called mpc83xx_pci_init()
+ * 2) Set up your inbound translation windows to the appropriate size
+ */
+void mpc83xx_pcislave_unlock(int bus)
+{
+	struct pci_controller *hose = &pci_hose[bus];
+	u32 dev;
+	u16 reg16;
+
+	/* Unlock configuration lock in PCI function configuration register */
+	dev = PCI_BDF(hose->first_busno, 0, 0);
+	pci_hose_read_config_word (hose, dev, PCI_FUNCTION_CONFIG, &reg16);
+	reg16 &= ~(PCI_FUNCTION_CFG_LOCK);
+	pci_hose_write_config_word (hose, dev, PCI_FUNCTION_CONFIG, reg16);
+
+	/* The configuration bit is now unlocked, so we can scan the bus */
+	hose->last_busno = pci_hose_scan(hose);
+}
+#endif
+
+#if defined(CONFIG_OF_LIBFDT)
+void ft_pci_setup(void *blob, bd_t *bd)
+{
+	int nodeoffset;
+	int tmp[2];
+	const char *path;
+
+	if (pci_num_buses < 1)
+		return;
+
+	nodeoffset = fdt_path_offset(blob, "/aliases");
+	if (nodeoffset >= 0) {
+		path = fdt_getprop(blob, nodeoffset, "pci0", NULL);
+		if (path) {
+			tmp[0] = cpu_to_be32(pci_hose[0].first_busno);
+			tmp[1] = cpu_to_be32(pci_hose[0].last_busno);
+			do_fixup_by_path(blob, path, "bus-range",
+				&tmp, sizeof(tmp), 1);
+
+			tmp[0] = cpu_to_be32(gd->pci_clk);
+			do_fixup_by_path(blob, path, "clock-frequency",
+				&tmp, sizeof(tmp[0]), 1);
+		}
+
+		if (pci_num_buses < 2)
+			return;
+
+		path = fdt_getprop(blob, nodeoffset, "pci1", NULL);
+		if (path) {
+			tmp[0] = cpu_to_be32(pci_hose[1].first_busno);
+			tmp[1] = cpu_to_be32(pci_hose[1].last_busno);
+			do_fixup_by_path(blob, path, "bus-range",
+				&tmp, sizeof(tmp), 1);
+
+			tmp[0] = cpu_to_be32(gd->pci_clk);
+			do_fixup_by_path(blob, path, "clock-frequency",
+				&tmp, sizeof(tmp[0]), 1);
+		}
+	}
+}
+#endif /* CONFIG_OF_LIBFDT */