[PATCH] ppc32: Added PCI support MPC83xx

Adds support for the two PCI busses on MPC83xx and the MPC834x SYS/PIBS
reference board.

The code initializes PCI inbound/outbound windows, allocates and registers
PCI memory/io space.  Be aware that setup of the PCI buses on the PIBs
board is expected to be done by the firmware.

Signed-off-by: Tony Li <tony.li@freescale.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 412 insertions, 8 deletions

diff --git a/arch/ppc/syslib/ppc83xx_pci.h b/arch/ppc/syslib/ppc83xx_pci.h
new file mode 100644
index 0000000..ec69164
--- /dev/null
+++ b/arch/ppc/syslib/ppc83xx_pci.h
@@ -0,0 +1,151 @@
+/* Created by Tony Li <tony.li@freescale.com>
+ * Copyright (c) 2005 freescale semiconductor
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __PPC_SYSLIB_PPC83XX_PCI_H
+#define __PPC_SYSLIB_PPC83XX_PCI_H
+
+typedef struct immr_clk {
+	u32 spmr; /* system PLL mode Register  */
+	u32 occr; /* output clock control Register  */
+	u32 sccr; /* system clock control Register  */
+	u8 res0[0xF4];
+} immr_clk_t;
+
+/*
+ * Sequencer
+ */
+typedef struct immr_ios {
+	u32	potar0;
+	u8	res0[4];
+	u32	pobar0;
+	u8	res1[4];
+	u32	pocmr0;
+	u8	res2[4];
+	u32	potar1;
+	u8	res3[4];
+	u32	pobar1;
+	u8	res4[4];
+	u32	pocmr1;
+	u8	res5[4];
+	u32	potar2;
+	u8	res6[4];
+	u32	pobar2;
+	u8	res7[4];
+	u32	pocmr2;
+	u8	res8[4];
+	u32	potar3;
+	u8	res9[4];
+	u32	pobar3;
+	u8	res10[4];
+	u32	pocmr3;
+	u8	res11[4];
+	u32	potar4;
+	u8	res12[4];
+	u32	pobar4;
+	u8	res13[4];
+	u32	pocmr4;
+	u8	res14[4];
+	u32	potar5;
+	u8	res15[4];
+	u32	pobar5;
+	u8	res16[4];
+	u32	pocmr5;
+	u8	res17[4];
+	u8	res18[0x60];
+	u32	pmcr;
+	u8	res19[4];
+	u32	dtcr;
+	u8	res20[4];
+} immr_ios_t;
+#define POTAR_TA_MASK	0x000fffff
+#define POBAR_BA_MASK	0x000fffff
+#define POCMR_EN	0x80000000
+#define POCMR_IO	0x40000000 /* 0--memory space 1--I/O space */
+#define POCMR_SE	0x20000000 /* streaming enable */
+#define POCMR_DST	0x10000000 /* 0--PCI1 1--PCI2 */
+#define POCMR_CM_MASK	0x000fffff
+
+/*
+ * PCI Controller Control and Status Registers
+ */
+typedef struct immr_pcictrl {
+	u32	esr;
+	u32	ecdr;
+	u32	eer;
+	u32	eatcr;
+	u32	eacr;
+	u32	eeacr;
+	u32	edlcr;
+	u32	edhcr;
+	u32	gcr;
+	u32	ecr;
+	u32	gsr;
+	u8	res0[12];
+	u32	pitar2;
+	u8	res1[4];
+	u32	pibar2;
+	u32	piebar2;
+	u32	piwar2;
+	u8	res2[4];
+	u32	pitar1;
+	u8	res3[4];
+	u32	pibar1;
+	u32	piebar1;
+	u32	piwar1;
+	u8	res4[4];
+	u32	pitar0;
+	u8	res5[4];
+	u32	pibar0;
+	u8	res6[4];
+	u32	piwar0;
+	u8	res7[132];
+} immr_pcictrl_t;
+#define PITAR_TA_MASK	0x000fffff
+#define PIBAR_MASK	0xffffffff
+#define PIEBAR_EBA_MASK	0x000fffff
+#define PIWAR_EN	0x80000000
+#define PIWAR_PF	0x20000000
+#define PIWAR_RTT_MASK	0x000f0000
+#define PIWAR_RTT_NO_SNOOP	0x00040000
+#define PIWAR_RTT_SNOOP	0x00050000
+#define PIWAR_WTT_MASK	0x0000f000
+#define PIWAR_WTT_NO_SNOOP	0x00004000
+#define PIWAR_WTT_SNOOP	0x00005000
+#define PIWAR_IWS_MASK	0x0000003F
+#define PIWAR_IWS_4K	0x0000000B
+#define PIWAR_IWS_8K	0x0000000C
+#define PIWAR_IWS_16K	0x0000000D
+#define PIWAR_IWS_32K	0x0000000E
+#define PIWAR_IWS_64K	0x0000000F
+#define PIWAR_IWS_128K	0x00000010
+#define PIWAR_IWS_256K	0x00000011
+#define PIWAR_IWS_512K	0x00000012
+#define PIWAR_IWS_1M	0x00000013
+#define PIWAR_IWS_2M	0x00000014
+#define PIWAR_IWS_4M	0x00000015
+#define PIWAR_IWS_8M	0x00000016
+#define PIWAR_IWS_16M	0x00000017
+#define PIWAR_IWS_32M	0x00000018
+#define PIWAR_IWS_64M	0x00000019
+#define PIWAR_IWS_128M	0x0000001A
+#define PIWAR_IWS_256M	0x0000001B
+#define PIWAR_IWS_512M	0x0000001C
+#define PIWAR_IWS_1G	0x0000001D
+#define PIWAR_IWS_2G	0x0000001E
+
+#endif /* __PPC_SYSLIB_PPC83XX_PCI_H */
diff --git a/arch/ppc/syslib/ppc83xx_setup.c b/arch/ppc/syslib/ppc83xx_setup.c
index 602a868..890484e 100644
--- a/arch/ppc/syslib/ppc83xx_setup.c
+++ b/arch/ppc/syslib/ppc83xx_setup.c
@@ -11,6 +11,17 @@
  * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Added PCI support -- Tony Li <tony.li@freescale.com>
  */
 
 #include <linux/config.h>
@@ -31,6 +42,10 @@
 #include <asm/delay.h>
 
 #include <syslib/ppc83xx_setup.h>
+#if defined(CONFIG_PCI)
+#include <asm/delay.h>
+#include <syslib/ppc83xx_pci.h>
+#endif
 
 phys_addr_t immrbar;
 
@@ -162,4 +177,237 @@ mpc83xx_halt(void)
 	for(;;);
 }
 
-/* PCI SUPPORT DOES NOT EXIT, MODEL after ppc85xx_setup.c */
+#if defined(CONFIG_PCI)
+void __init
+mpc83xx_setup_pci1(struct pci_controller *hose)
+{
+	u16 reg16;
+	volatile immr_pcictrl_t * pci_ctrl;
+	volatile immr_ios_t * ios;
+	bd_t *binfo = (bd_t *) __res;
+
+	pci_ctrl = ioremap(binfo->bi_immr_base + 0x8500, sizeof(immr_pcictrl_t));
+	ios = ioremap(binfo->bi_immr_base + 0x8400, sizeof(immr_ios_t));
+
+	/*
+	 * Configure PCI Outbound Translation Windows
+	 */
+	ios->potar0 = (MPC83xx_PCI1_LOWER_MEM >> 12) & POTAR_TA_MASK;
+	ios->pobar0 = (MPC83xx_PCI1_LOWER_MEM >> 12) & POBAR_BA_MASK;
+	ios->pocmr0 = POCMR_EN |
+		(((0xffffffff - (MPC83xx_PCI1_UPPER_MEM -
+				MPC83xx_PCI1_LOWER_MEM)) >> 12) & POCMR_CM_MASK);
+
+	/* mapped to PCI1 IO space */
+	ios->potar1 = (MPC83xx_PCI1_LOWER_IO >> 12) & POTAR_TA_MASK;
+	ios->pobar1 = (MPC83xx_PCI1_IO_BASE >> 12) & POBAR_BA_MASK;
+	ios->pocmr1 = POCMR_EN | POCMR_IO |
+		(((0xffffffff - (MPC83xx_PCI1_UPPER_IO -
+				MPC83xx_PCI1_LOWER_IO)) >> 12) & POCMR_CM_MASK);
+
+	/*
+	 * Configure PCI Inbound Translation Windows
+	 */
+	pci_ctrl->pitar1 = 0x0;
+	pci_ctrl->pibar1 = 0x0;
+	pci_ctrl->piebar1 = 0x0;
+	pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | PIWAR_IWS_2G;
+
+	/*
+	 * Release PCI RST signal
+	 */
+	pci_ctrl->gcr = 0;
+	udelay(2000);
+	pci_ctrl->gcr = 1;
+	udelay(2000);
+
+	reg16 = 0xff;
+	early_read_config_word(hose, hose->first_busno, 0, PCI_COMMAND, &reg16);
+	reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	early_write_config_word(hose, hose->first_busno, 0, PCI_COMMAND, reg16);
+
+	/*
+	 * Clear non-reserved bits in status register.
+	 */
+	early_write_config_word(hose, hose->first_busno, 0, PCI_STATUS, 0xffff);
+	early_write_config_byte(hose, hose->first_busno, 0, PCI_LATENCY_TIMER, 0x80);
+
+	iounmap(pci_ctrl);
+	iounmap(ios);
+}
+
+void __init
+mpc83xx_setup_pci2(struct pci_controller *hose)
+{
+	u16 reg16;
+	volatile immr_pcictrl_t * pci_ctrl;
+	volatile immr_ios_t * ios;
+	bd_t *binfo = (bd_t *) __res;
+
+	pci_ctrl = ioremap(binfo->bi_immr_base + 0x8600, sizeof(immr_pcictrl_t));
+	ios = ioremap(binfo->bi_immr_base + 0x8400, sizeof(immr_ios_t));
+
+	/*
+	 * Configure PCI Outbound Translation Windows
+	 */
+	ios->potar3 = (MPC83xx_PCI2_LOWER_MEM >> 12) & POTAR_TA_MASK;
+	ios->pobar3 = (MPC83xx_PCI2_LOWER_MEM >> 12) & POBAR_BA_MASK;
+	ios->pocmr3 = POCMR_EN | POCMR_DST |
+		(((0xffffffff - (MPC83xx_PCI2_UPPER_MEM -
+				MPC83xx_PCI2_LOWER_MEM)) >> 12) & POCMR_CM_MASK);
+
+	/* mapped to PCI2 IO space */
+	ios->potar4 = (MPC83xx_PCI2_LOWER_IO >> 12) & POTAR_TA_MASK;
+	ios->pobar4 = (MPC83xx_PCI2_IO_BASE >> 12) & POBAR_BA_MASK;
+	ios->pocmr4 = POCMR_EN | POCMR_DST | POCMR_IO |
+		(((0xffffffff - (MPC83xx_PCI2_UPPER_IO -
+				MPC83xx_PCI2_LOWER_IO)) >> 12) & POCMR_CM_MASK);
+
+	/*
+	 * Configure PCI Inbound Translation Windows
+	 */
+	pci_ctrl->pitar1 = 0x0;
+	pci_ctrl->pibar1 = 0x0;
+	pci_ctrl->piebar1 = 0x0;
+	pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | PIWAR_IWS_2G;
+
+	/*
+	 * Release PCI RST signal
+	 */
+	pci_ctrl->gcr = 0;
+	udelay(2000);
+	pci_ctrl->gcr = 1;
+	udelay(2000);
+
+	reg16 = 0xff;
+	early_read_config_word(hose, hose->first_busno, 0, PCI_COMMAND, &reg16);
+	reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+	early_write_config_word(hose, hose->first_busno, 0, PCI_COMMAND, reg16);
+
+	/*
+	 * Clear non-reserved bits in status register.
+	 */
+	early_write_config_word(hose, hose->first_busno, 0, PCI_STATUS, 0xffff);
+	early_write_config_byte(hose, hose->first_busno, 0, PCI_LATENCY_TIMER, 0x80);
+
+	iounmap(pci_ctrl);
+	iounmap(ios);
+}
+
+/*
+ * PCI buses can be enabled only if SYS board combinates with PIB
+ * (Platform IO Board) board which provide 3 PCI slots. There is 2 PCI buses
+ * and 3 PCI slots, so people must configure the routes between them before
+ * enable PCI bus. This routes are under the control of PCA9555PW device which
+ * can be accessed via I2C bus 2 and are configured by firmware. Refer to
+ * Freescale to get more information about firmware configuration.
+ */
+
+extern int mpc83xx_exclude_device(u_char bus, u_char devfn);
+extern int mpc83xx_map_irq(struct pci_dev *dev, unsigned char idsel,
+		unsigned char pin);
+void __init
+mpc83xx_setup_hose(void)
+{
+	u32 val32;
+	volatile immr_clk_t * clk;
+	struct pci_controller * hose1;
+#ifdef CONFIG_MPC83xx_PCI2
+	struct pci_controller * hose2;
+#endif
+	bd_t * binfo = (bd_t *)__res;
+
+	clk = ioremap(binfo->bi_immr_base + 0xA00,
+			sizeof(immr_clk_t));
+
+	/*
+	 * Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
+	 */
+	val32 = clk->occr;
+	udelay(2000);
+	clk->occr = 0xff000000;
+	udelay(2000);
+
+	iounmap(clk);
+
+	hose1 = pcibios_alloc_controller();
+	if(!hose1)
+		return;
+
+	ppc_md.pci_swizzle = common_swizzle;
+	ppc_md.pci_map_irq = mpc83xx_map_irq;
+
+	hose1->bus_offset = 0;
+	hose1->first_busno = 0;
+	hose1->last_busno = 0xff;
+
+	setup_indirect_pci(hose1, binfo->bi_immr_base + PCI1_CFG_ADDR_OFFSET,
+			binfo->bi_immr_base + PCI1_CFG_DATA_OFFSET);
+	hose1->set_cfg_type = 1;
+
+	mpc83xx_setup_pci1(hose1);
+
+	hose1->pci_mem_offset = MPC83xx_PCI1_MEM_OFFSET;
+	hose1->mem_space.start = MPC83xx_PCI1_LOWER_MEM;
+	hose1->mem_space.end = MPC83xx_PCI1_UPPER_MEM;
+
+	hose1->io_base_phys = MPC83xx_PCI1_IO_BASE;
+	hose1->io_space.start = MPC83xx_PCI1_LOWER_IO;
+	hose1->io_space.end = MPC83xx_PCI1_UPPER_IO;
+#ifdef CONFIG_MPC83xx_PCI2
+	isa_io_base = (unsigned long)ioremap(MPC83xx_PCI1_IO_BASE,
+			MPC83xx_PCI1_IO_SIZE + MPC83xx_PCI2_IO_SIZE);
+#else
+	isa_io_base = (unsigned long)ioremap(MPC83xx_PCI1_IO_BASE,
+			MPC83xx_PCI1_IO_SIZE);
+#endif /* CONFIG_MPC83xx_PCI2 */
+	hose1->io_base_virt = (void *)isa_io_base;
+	/* setup resources */
+	pci_init_resource(&hose1->io_resource,
+			MPC83xx_PCI1_LOWER_IO,
+			MPC83xx_PCI1_UPPER_IO,
+			IORESOURCE_IO, "PCI host bridge 1");
+	pci_init_resource(&hose1->mem_resources[0],
+			MPC83xx_PCI1_LOWER_MEM,
+			MPC83xx_PCI1_UPPER_MEM,
+			IORESOURCE_MEM, "PCI host bridge 1");
+
+	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
+	hose1->last_busno = pciauto_bus_scan(hose1, hose1->first_busno);
+
+#ifdef CONFIG_MPC83xx_PCI2
+	hose2 = pcibios_alloc_controller();
+	if(!hose2)
+		return;
+
+	hose2->bus_offset = hose1->last_busno + 1;
+	hose2->first_busno = hose1->last_busno + 1;
+	hose2->last_busno = 0xff;
+	setup_indirect_pci(hose2, binfo->bi_immr_base + PCI2_CFG_ADDR_OFFSET,
+			binfo->bi_immr_base + PCI2_CFG_DATA_OFFSET);
+	hose2->set_cfg_type = 1;
+
+	mpc83xx_setup_pci2(hose2);
+
+	hose2->pci_mem_offset = MPC83xx_PCI2_MEM_OFFSET;
+	hose2->mem_space.start = MPC83xx_PCI2_LOWER_MEM;
+	hose2->mem_space.end = MPC83xx_PCI2_UPPER_MEM;
+
+	hose2->io_base_phys = MPC83xx_PCI2_IO_BASE;
+	hose2->io_space.start = MPC83xx_PCI2_LOWER_IO;
+	hose2->io_space.end = MPC83xx_PCI2_UPPER_IO;
+	hose2->io_base_virt = (void *)(isa_io_base + MPC83xx_PCI1_IO_SIZE);
+	/* setup resources */
+	pci_init_resource(&hose2->io_resource,
+			MPC83xx_PCI2_LOWER_IO,
+			MPC83xx_PCI2_UPPER_IO,
+			IORESOURCE_IO, "PCI host bridge 2");
+	pci_init_resource(&hose2->mem_resources[0],
+			MPC83xx_PCI2_LOWER_MEM,
+			MPC83xx_PCI2_UPPER_MEM,
+			IORESOURCE_MEM, "PCI host bridge 2");
+
+	hose2->last_busno = pciauto_bus_scan(hose2, hose2->first_busno);
+#endif /* CONFIG_MPC83xx_PCI2 */
+}
+#endif /*CONFIG_PCI*/
diff --git a/arch/ppc/syslib/ppc83xx_setup.h b/arch/ppc/syslib/ppc83xx_setup.h
index 683f179..c766c1a 100644
--- a/arch/ppc/syslib/ppc83xx_setup.h
+++ b/arch/ppc/syslib/ppc83xx_setup.h
@@ -12,6 +12,14 @@
  * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #ifndef __PPC_SYSLIB_PPC83XX_SETUP_H
@@ -19,7 +27,6 @@
 
 #include <linux/config.h>
 #include <linux/init.h>
-#include <asm/ppcboot.h>
 
 extern unsigned long mpc83xx_find_end_of_memory(void) __init;
 extern long mpc83xx_time_init(void) __init;
@@ -31,13 +38,11 @@ extern void mpc83xx_halt(void);
 extern void mpc83xx_setup_hose(void) __init;
 
 /* PCI config */
-#if 0
-#define PCI1_CFG_ADDR_OFFSET	(FIXME)
-#define PCI1_CFG_DATA_OFFSET	(FIXME)
+#define PCI1_CFG_ADDR_OFFSET (0x8300)
+#define PCI1_CFG_DATA_OFFSET (0x8304)
 
-#define PCI2_CFG_ADDR_OFFSET	(FIXME)
-#define PCI2_CFG_DATA_OFFSET	(FIXME)
-#endif
+#define PCI2_CFG_ADDR_OFFSET (0x8380)
+#define PCI2_CFG_DATA_OFFSET (0x8384)
 
 /* Serial Config */
 #ifdef CONFIG_SERIAL_MANY_PORTS