[PATCH 1/3] add USB setup code for 8349emds PB

[Li Yang]

Add board specific initialization code for USB
to work in both MPH and DR mode for MPC8349EMDS
PB board.

Signed-off-by: Li Yang <leoli at freescale.com>
---

 arch/powerpc/platforms/83xx/Kconfig       |    4 ++
 arch/powerpc/platforms/83xx/mpc834x_sys.c |   79 +++++++++++++++++++++++++++++
 arch/powerpc/platforms/83xx/mpc834x_sys.h |    2 +
 arch/powerpc/platforms/83xx/mpc83xx.h     |   18 +++++++
 4 files changed, 103 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/platforms/83xx/Kconfig b/arch/powerpc/platforms/83xx/Kconfig
index edcd5b8..5371645 100644
--- a/arch/powerpc/platforms/83xx/Kconfig
+++ b/arch/powerpc/platforms/83xx/Kconfig
@@ -59,4 +59,8 @@ config PPC_MPC836x
 	select PPC_INDIRECT_PCI
 	default y if MPC8360E_PB
 
+config 834x_USB_SUPPORT
+	bool
+	default y if MPC834x_SYS && (USB || USB_GADGET)
+
 endmenu
diff --git a/arch/powerpc/platforms/83xx/mpc834x_sys.c b/arch/powerpc/platforms/83xx/mpc834x_sys.c
index 80b735a..aff7ae3 100644
--- a/arch/powerpc/platforms/83xx/mpc834x_sys.c
+++ b/arch/powerpc/platforms/83xx/mpc834x_sys.c
@@ -35,14 +35,88 @@
 #include <asm/prom.h>
 #include <asm/udbg.h>
 #include <sysdev/fsl_soc.h>
+#include <linux/fsl_devices.h>
 
 #include "mpc83xx.h"
+#include "mpc834x_sys.h"
 
 #ifndef CONFIG_PCI
 unsigned long isa_io_base = 0;
 unsigned long isa_mem_base = 0;
 #endif
 
+static volatile u8 *bcsr_regs = NULL;
+
+#ifdef CONFIG_834x_USB_SUPPORT
+/* Note: This is only for PB, not for PB+PIB
+ * On PB only port0 is connected using ULPI */
+static int mpc834x_usb_cfg(void)
+{
+	unsigned long sccr, sicrl;
+	void __iomem *immap;
+	struct device_node *np = NULL;
+	int port0_is_dr = 0;
+
+	if ((np = of_find_compatible_node(np, "usb", "fsl-usb2-dr")) != NULL)
+		port0_is_dr = 1;
+	if ((np = of_find_compatible_node(np, "usb", "fsl-usb2-mph")) != NULL){
+		if (port0_is_dr) {
+			printk(KERN_WARNING
+				"There is only one USB port on PB board! \n");
+			return -1;
+		} else if (!port0_is_dr)
+			/* No usb port enabled */
+			return -1;
+	}
+
+	immap = ioremap(get_immrbase(), 0x100000);
+	if (!immap)
+		return -1;
+
+	/* Configure clock */
+	sccr = in_be32(immap + MPC83XX_SCCR_OFFS);
+	if (port0_is_dr)
+		sccr |= MPC83XX_SCCR_USB_DRCM_11;  /* 1:3 */
+	else
+		sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
+	out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
+
+	/* Configure Pin */
+	sicrl = in_be32(immap + MPC83XX_SICRL_OFFS);
+	/* set port0 only */
+	if (port0_is_dr)
+		sicrl |= MPC83XX_SICRL_USB0;
+	else
+		sicrl &= ~(MPC83XX_SICRL_USB0);
+	out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
+
+	iounmap(immap);
+
+	/* Map BCSR area */
+	np = of_find_node_by_name(NULL, "bcsr");
+	if (np != 0) {
+		struct resource res;
+
+		of_address_to_resource(np, 0, &res);
+		bcsr_regs = ioremap(res.start, res.end - res.start + 1);
+		of_node_put(np);
+	}
+	if (!bcsr_regs)
+		return -1;
+
+	/*
+	 * if SYS board is plug into PIB board,
+	 * force to use the PHY on SYS board
+	 */
+	if (!(bcsr_regs[5] & BCSR5_INT_USB))
+		bcsr_regs[5] |= BCSR5_INT_USB;
+	iounmap(bcsr_regs);
+	return 0;
+}
+
+#endif /* CONFIG_834x_USB_SUPPORT */
+
+
 /* ************************************************************************
  *
  * Setup the architecture
@@ -65,6 +139,7 @@ static void __init mpc834x_sys_setup_arch(void)
 			loops_per_jiffy = 50000000 / HZ;
 		of_node_put(np);
 	}
+
 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
 		add_bridge(np);
@@ -72,6 +147,10 @@ static void __init mpc834x_sys_setup_arch(void)
 	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
 #endif
 
+#ifdef CONFIG_834x_USB_SUPPORT
+	mpc834x_usb_cfg();
+#endif
+
 #ifdef  CONFIG_ROOT_NFS
 	ROOT_DEV = Root_NFS;
 #else
diff --git a/arch/powerpc/platforms/83xx/mpc834x_sys.h b/arch/powerpc/platforms/83xx/mpc834x_sys.h
index 7d5bbef..52f14a3 100644
--- a/arch/powerpc/platforms/83xx/mpc834x_sys.h
+++ b/arch/powerpc/platforms/83xx/mpc834x_sys.h
@@ -20,4 +20,6 @@
 #define PIRQC	MPC83xx_IRQ_EXT6
 #define PIRQD	MPC83xx_IRQ_EXT7
 
+#define BCSR5_INT_USB		0x02
+
 #endif				/* __MACH_MPC83XX_SYS_H__ */
diff --git a/arch/powerpc/platforms/83xx/mpc83xx.h b/arch/powerpc/platforms/83xx/mpc83xx.h
index 01cae10..9cd03b5 100644
--- a/arch/powerpc/platforms/83xx/mpc83xx.h
+++ b/arch/powerpc/platforms/83xx/mpc83xx.h
@@ -4,6 +4,24 @@
 #include <linux/init.h>
 #include <linux/device.h>
 
+/* System Clock Control Register */
+#define MPC83XX_SCCR_OFFS          0xA08
+#define MPC83XX_SCCR_USB_MPHCM_11  0x00c00000
+#define MPC83XX_SCCR_USB_MPHCM_01  0x00400000
+#define MPC83XX_SCCR_USB_MPHCM_10  0x00800000
+#define MPC83XX_SCCR_USB_DRCM_11   0x00300000
+#define MPC83XX_SCCR_USB_DRCM_01   0x00100000
+#define MPC83XX_SCCR_USB_DRCM_10   0x00200000
+
+/* system i/o configuration register low */
+#define MPC83XX_SICRL_OFFS         0x114
+#define MPC83XX_SICRL_USB0         0x40000000
+#define MPC83XX_SICRL_USB1         0x20000000
+
+/* system i/o configuration register high */
+#define MPC83XX_SICRH_OFFS         0x118
+#define MPC83XX_SICRH_USB_UTMI     0x00020000
+
 /*
  * Declaration for the various functions exported by the
  * mpc83xx_* files. Mostly for use by mpc83xx_setup