sparc: leon3: Reimplemented AMBA Plug&Play scanning routines.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>

1 files changed, 175 insertions, 190 deletions

diff --git a/include/ambapp.h b/include/ambapp.h
index 405637d..7643df5 100644
--- a/include/ambapp.h
+++ b/include/ambapp.h
@@ -3,8 +3,8 @@
  * the APB bus, also freely available in GRLIB at
  * www.gaisler.com.
  *
- * (C) Copyright 2007
- * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
+ * (C) Copyright 2009, 2015
+ * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -12,116 +12,136 @@
 #ifndef __AMBAPP_H__
 #define __AMBAPP_H__
 
-/* Default location of Plug&Play info
- * normally 0xfffff000 for AHB masters
- * and 0xfffff800 for AHB slaves.
- * Normally no need to change this.
- */
-#define LEON3_IO_AREA 0xfff00000
-#define LEON3_CONF_AREA  0xff000
-#define LEON3_AHB_SLAVE_CONF_AREA (1 << 11)
-
-/* Max devices this software will support */
-#define LEON3_AHB_MASTERS 16
-#define LEON3_AHB_SLAVES 16
-/*#define LEON3_APB_MASTERS 1*/ /* Number of APB buses that has Plug&Play */
-#define LEON3_APB_SLAVES 16	/* Total number of APB slaves per APB bus */
-
-/* Vendor codes */
-#define VENDOR_GAISLER       1
-#define VENDOR_PENDER        2
-#define VENDOR_ESA           4
-#define VENDOR_ASTRIUM       6
-#define VENDOR_OPENCHIP      7
-#define VENDOR_OPENCORES     8
-#define VENDOR_CONTRIB       9
-#define VENDOR_EONIC         11
-#define VENDOR_RADIONOR      15
-#define VENDOR_GLEICHMANN    16
-#define VENDOR_MENTA         17
-#define VENDOR_SUN           19
-#define VENDOR_EMBEDDIT      234
-#define VENDOR_CAL           202
-
-/* Gaisler Research device id's */
-#define GAISLER_LEON3    0x003
-#define GAISLER_LEON3DSU 0x004
-#define GAISLER_ETHAHB   0x005
-#define GAISLER_APBMST   0x006
-#define GAISLER_AHBUART  0x007
-#define GAISLER_SRCTRL   0x008
-#define GAISLER_SDCTRL   0x009
-#define GAISLER_APBUART  0x00C
-#define GAISLER_IRQMP    0x00D
-#define GAISLER_AHBRAM   0x00E
-#define GAISLER_GPTIMER  0x011
-#define GAISLER_PCITRG   0x012
-#define GAISLER_PCISBRG  0x013
-#define GAISLER_PCIFBRG  0x014
-#define GAISLER_PCITRACE 0x015
-#define GAISLER_PCIDMA   0x016
-#define GAISLER_AHBTRACE 0x017
-#define GAISLER_ETHDSU   0x018
-#define GAISLER_PIOPORT  0x01A
-#define GAISLER_AHBJTAG  0x01c
-#define GAISLER_SPW      0x01f
-#define GAISLER_ATACTRL  0x024
-#define GAISLER_VGA      0x061
-#define GAISLER_KBD      0X060
-#define GAISLER_ETHMAC   0x01D
-#define GAISLER_DDRSPA   0x025
-#define GAISLER_EHCI     0x026
-#define GAISLER_UHCI     0x027
-#define GAISLER_SPW2     0x029
-#define GAISLER_DDR2SPA  0x02E
-#define GAISLER_AHBSTAT  0x052
-#define GAISLER_FTMCTRL  0x054
-
-#define GAISLER_L2TIME   0xffd	/* internal device: leon2 timer */
-#define GAISLER_L2C      0xffe	/* internal device: leon2compat */
-#define GAISLER_PLUGPLAY 0xfff	/* internal device: plug & play configarea */
-
-/* European Space Agency device id's */
-#define ESA_LEON2        0x2
-#define ESA_MCTRL        0xF
-
-/* Opencores device id's */
-#define OPENCORES_PCIBR  0x4
-#define OPENCORES_ETHMAC 0x5
-
-/* Vendor codes */
-
-/*
- *
- * Macros for manipulating Configuration registers
- *
- */
+#include <ambapp_ids.h>
 
-#define amba_vendor(x) (((x) >> 24) & 0xff)
-
-#define amba_device(x) (((x) >> 12) & 0xfff)
-
-#define amba_membar_start(mbar) \
- (((mbar) & 0xfff00000) & (((mbar) & 0xfff0) << 16))
-
-#define amba_iobar_start(base, iobar) \
- ((base) | ((((iobar) & 0xfff00000)>>12) & (((iobar) & 0xfff0)<<4)) )
-
-#define amba_irq(conf) ((conf) & 0xf)
+#ifndef __ASSEMBLER__
+/* Structures used to access Plug&Play information directly */
+struct ambapp_pnp_ahb {
+	const unsigned int	id;		/* VENDOR, DEVICE, VER, IRQ, */
+	const unsigned int	custom[3];
+	const unsigned int	mbar[4];	/* MASK, ADDRESS, TYPE,
+						 * CACHABLE/PREFETCHABLE */
+};
+
+struct ambapp_pnp_apb {
+	const unsigned int	id;		/* VENDOR, DEVICE, VER, IRQ, */
+	const unsigned int	iobar;		/* MASK, ADDRESS, TYPE,
+						 * CACHABLE/PREFETCHABLE */
+};
 
-#define amba_ver(conf) (((conf)>>5) & 0x1f)
+/* AMBA Plug&Play AHB Masters & Slaves information locations
+ * Max devices is 64 supported by HW, however often only 16
+ * are used.
+ */
+struct ambapp_pnp_info {
+	struct ambapp_pnp_ahb	masters[64];
+	struct ambapp_pnp_ahb	slaves[63];
+	const unsigned int	unused[4];
+	const unsigned int	systemid[4];
+};
+
+/* Describes a AMBA PnP bus */
+struct ambapp_bus {
+	int		buses;		/* Number of buses */
+	unsigned int	ioareas[6];	/* PnP I/O AREAs of AHB buses */
+	unsigned int	freq;		/* Frequency of bus0 [Hz] */
+};
+
+/* Processor Local AMBA bus */
+extern struct ambapp_bus ambapp_plb;
+
+/* Get Bus frequency of a certain AMBA bus */
+extern unsigned int ambapp_bus_freq(
+	struct ambapp_bus *abus,
+	int ahb_bus_index
+	);
+
+/* AMBA PnP information of a APB Device */
+typedef struct {
+	unsigned int vendor;
+	unsigned int device;
+	unsigned char irq;
+	unsigned char ver;
+	unsigned int address;
+	unsigned int mask;
+	int ahb_bus_index;
+} ambapp_apbdev;
 
-#define amba_membar_type(mbar) ((mbar) & 0xf)
+/* AMBA PnP information of a AHB Device */
+typedef struct {
+	unsigned int vendor;
+	unsigned int device;
+	unsigned char irq;
+	unsigned char ver;
+	unsigned int userdef[3];
+	unsigned int address[4];
+	unsigned int mask[4];
+	int type[4];
+	int ahb_bus_index;
+} ambapp_ahbdev;
 
-#define amba_membar_mask(mbar) (((mbar)>>4) & 0xfff)
+/* Scan AMBA Bus for AHB Bridges */
+extern void ambapp_bus_init(
+	unsigned int ioarea,
+	unsigned int freq,
+	struct ambapp_bus *abus);
 
-#define AMBA_TYPE_APBIO 0x1
-#define AMBA_TYPE_MEM   0x2
-#define AMBA_TYPE_AHBIO 0x3
+/* Find APB Slave device by index using breath first search.
+ *
+ * When vendor and device are both set to zero, any device
+ * with a non-zero device ID will match the search. It may be
+ * useful when processing all devices on a AMBA bus.
+ */
+extern int ambapp_apb_find(
+	struct ambapp_bus *abus,
+	int vendor,
+	int device,
+	int index,
+	ambapp_apbdev *dev
+	);
+
+/* Find AHB Master device by index using breath first search.
+ *
+ * When vendor and device are both set to zero, any device
+ * with a non-zero device ID will match the search. It may be
+ * useful when processing all devices on a AMBA bus.
+ */
+extern int ambapp_ahbmst_find(
+	struct ambapp_bus *abus,
+	int vendor,
+	int device,
+	int index,
+	ambapp_ahbdev *dev
+	);
+
+/* Find AHB Slave device by index using breath first search.
+ *
+ * When vendor and device are both set to zero, any device
+ * with a non-zero device ID will match the search. It may be
+ * useful when processing all devices on a AMBA bus.
+ */
+extern int ambapp_ahbslv_find(
+	struct ambapp_bus *abus,
+	int vendor,
+	int device,
+	int index,
+	ambapp_ahbdev *dev
+	);
+
+/* Return number of APB Slave devices of a certain ID (VENDOR:DEVICE)
+ * zero is returned if no devices was found.
+ */
+extern int ambapp_apb_count(struct ambapp_bus *abus, int vendor, int device);
 
-#define AMBA_TYPE_AHBIO_ADDR(addr) (LEON3_IO_AREA | ((addr) >> 12))
+/* Return number of AHB Master devices of a certain ID (VENDOR:DEVICE)
+ * zero is returned if no devices was found.
+ */
+extern int ambapp_ahbmst_count(struct ambapp_bus *abus, int vendor, int device);
 
-#ifndef __ASSEMBLER__
+/* Return number of AHB Slave devices of a certain ID (VENDOR:DEVICE)
+ * zero is returned if no devices was found.
+ */
+extern int ambapp_ahbslv_count(struct ambapp_bus *abus, int vendor, int device);
 
 #ifdef CONFIG_CMD_AMBAPP
 
@@ -135,109 +155,72 @@ char *ambapp_device_id2str(int vendor, int id);
 
 /* Return name of vendor */
 char *ambapp_vendor_id2str(int vendor);
-#endif
 
-/*
- *  Types and structure used for AMBA Plug & Play bus scanning
- */
+/* Return description of a device */
+char *ambapp_device_id2desc(int vendor, int id);
 
-/* AMBA Plug&Play AHB information layout */
-typedef struct {
-	unsigned int conf;
-	unsigned int userdef[3];
-	unsigned int bars[4];
-} ahbctrl_pp_dev;
+#endif
 
-/* Prototypes for scanning AMBA Plug&Play bus for AMBA
- *  i)   AHB Masters
- *  ii)  AHB Slaves
- *  iii) APB Slaves (APB MST is a AHB Slave)
- */
+#endif /* defined(__ASSEMBLER__) */
 
-typedef struct {
-	unsigned char irq;
-	unsigned char ver;
-	unsigned int address;
-} ambapp_apbdev;
-
-typedef struct {
-	unsigned char irq;
-	unsigned char ver;
-	unsigned int userdef[3];
-	unsigned int address[4];
-} ambapp_ahbdev;
+#define AMBA_DEFAULT_IOAREA 0xfff00000
+#define AMBA_CONF_AREA 0xff000
+#define AMBA_AHB_SLAVE_CONF_AREA 0x800
 
-/* AMBA Plug&Play AHB Masters & Slaves information locations
- * Max devices is 64 supported by HW, however often only 8
- * are used.
- */
-typedef struct {
-	ahbctrl_pp_dev masters[64];
-	ahbctrl_pp_dev slaves[64];
-} ahbctrl_info;
+#define DEV_NONE	0
+#define DEV_AHB_MST	1
+#define DEV_AHB_SLV	2
+#define DEV_APB_SLV	3
 
-/* AMBA Plug&Play AHB information layout */
-typedef struct {
-	unsigned int conf;
-	unsigned int bar;
-} apbctrl_pp_dev;
+#define AMBA_TYPE_APBIO 0x1
+#define AMBA_TYPE_MEM 0x2
+#define AMBA_TYPE_AHBIO 0x3
 
-/* All functions return the number of found devices
- * 0 = no devices found
+/* ID layout for APB and AHB devices */
+#define AMBA_PNP_ID(vendor, device) (((vendor)<<24) | ((device)<<12))
+
+/* APB Slave PnP layout definitions */
+#define AMBA_APB_ID_OFS		(0*4)
+#define AMBA_APB_IOBAR_OFS	(1*4)
+#define AMBA_APB_CONF_LENGH	(2*4)
+
+/* AHB Master/Slave layout PnP definitions */
+#define AMBA_AHB_ID_OFS		(0*4)
+#define AMBA_AHB_CUSTOM0_OFS	(1*4)
+#define AMBA_AHB_CUSTOM1_OFS	(2*4)
+#define AMBA_AHB_CUSTOM2_OFS	(3*4)
+#define AMBA_AHB_MBAR0_OFS	(4*4)
+#define AMBA_AHB_MBAR1_OFS	(5*4)
+#define AMBA_AHB_MBAR2_OFS	(6*4)
+#define AMBA_AHB_MBAR3_OFS	(7*4)
+#define AMBA_AHB_CONF_LENGH	(8*4)
+
+/* Macros for extracting information from AMBA PnP information
+ * registers.
  */
 
-/****************************** APB SLAVES ******************************/
-int ambapp_apb_count(unsigned int vendor, unsigned int driver);
-
-int ambapp_apb_first(unsigned int vendor,
-		     unsigned int driver, ambapp_apbdev * dev);
-
-int ambapp_apb_next(unsigned int vendor,
-		    unsigned int driver, ambapp_apbdev * dev, int index);
-
-int ambapp_apbs_first(unsigned int vendor,
-		      unsigned int driver, ambapp_apbdev * dev, int max_cnt);
-
-/****************************** AHB MASTERS ******************************/
-int ambapp_ahbmst_count(unsigned int vendor, unsigned int driver);
-
-int ambapp_ahbmst_first(unsigned int vendor,
-			unsigned int driver, ambapp_ahbdev * dev);
+#define amba_vendor(x) (((x) >> 24) & 0xff)
 
-int ambapp_ahbmst_next(unsigned int vendor,
-		       unsigned int driver, ambapp_ahbdev * dev, int index);
+#define amba_device(x) (((x) >> 12) & 0xfff)
 
-int ambapp_ahbmsts_first(unsigned int vendor,
-			 unsigned int driver, ambapp_ahbdev * dev, int max_cnt);
+#define amba_irq(conf) ((conf) & 0x1f)
 
-/****************************** AHB SLAVES ******************************/
-int ambapp_ahbslv_count(unsigned int vendor, unsigned int driver);
+#define amba_ver(conf) (((conf)>>5) & 0x1f)
 
-int ambapp_ahbslv_first(unsigned int vendor,
-			unsigned int driver, ambapp_ahbdev * dev);
+#define amba_iobar_start(base, iobar) \
+	((base) | ((((iobar) & 0xfff00000)>>12) & (((iobar) & 0xfff0)<<4)))
 
-int ambapp_ahbslv_next(unsigned int vendor,
-		       unsigned int driver, ambapp_ahbdev * dev, int index);
+#define amba_membar_start(mbar) \
+	(((mbar) & 0xfff00000) & (((mbar) & 0xfff0) << 16))
 
-int ambapp_ahbslvs_first(unsigned int vendor,
-			 unsigned int driver, ambapp_ahbdev * dev, int max_cnt);
+#define amba_membar_type(mbar) ((mbar) & 0xf)
 
-/*************************** AHB/APB only regs functions *************************
- * During start up, no memory is available we can use the simplified functions
- * to get to the memory controller.
- *
- * Functions uses no stack/memory, only registers.
- */
-unsigned int ambapp_apb_next_nomem(register unsigned int vendor,	/* Plug&Play Vendor ID */
-				   register unsigned int driver,	/* Plug&Play Device ID */
-				   register int index);
+#define amba_membar_mask(mbar) (((mbar) >> 4) & 0xfff)
 
-ahbctrl_pp_dev *ambapp_ahb_next_nomem(register unsigned int vendor,	/* Plug&Play Vendor ID */
-				      register unsigned int driver,	/* Plug&Play Device ID */
-				      register unsigned int opts,	/* scan for AHB 1=slave, 0=masters */
-				      register int index);
+#define amba_ahbio_adr(addr, base_ioarea) \
+	((unsigned int)(base_ioarea) | ((addr) >> 12))
 
-unsigned int ambapp_ahb_get_info(ahbctrl_pp_dev * ahb, int info);
+#define amba_apb_mask(iobar) ((~(amba_membar_mask(iobar)<<8) & 0x000fffff) + 1)
 
 /*************************** AMBA Plug&Play device register MAPS *****************/
 
@@ -291,6 +274,8 @@ unsigned int ambapp_ahb_get_info(ahbctrl_pp_dev * ahb, int info);
 #define LEON_REG_PS2_CTRL_RI     0x00000004	/* Keyboard receive interrupt  */
 #define LEON_REG_PS2_CTRL_TI     0x00000008	/* Keyboard transmit interrupt */
 
+#ifndef __ASSEMBLER__
+
 typedef struct {
 	volatile unsigned int ilevel;
 	volatile unsigned int ipend;