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-rw-r--r--cpu/leon3/ambapp.c339
1 files changed, 339 insertions, 0 deletions
diff --git a/cpu/leon3/ambapp.c b/cpu/leon3/ambapp.c
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+/* Gaisler AMBA Plug&Play bus scanning. Functions
+ * ending on _nomem is inteded to be used only during
+ * initialization, only registers are used (no ram).
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
+ *
+ * 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 <command.h>
+#include <ambapp.h>
+
+static int ambapp_apb_scan(unsigned int vendor, /* Plug&Play Vendor ID */
+ unsigned int driver, /* Plug&Play Device ID */
+ ambapp_apbdev * dev, /* Result(s) is placed here */
+ int index, /* Index of device to start copying Plug&Play
+ * info into dev
+ */
+ int max_cnt /* Maximal count that dev can hold, if dev
+ * is NULL function will stop scanning after
+ * max_cnt devices are found.
+ */
+ )
+{
+ int i, cnt = 0;
+ unsigned int apbmst_base;
+ ambapp_ahbdev apbmst;
+ apbctrl_pp_dev *apb;
+
+ if (max_cnt == 0)
+ return 0;
+
+ /* Get AMBA APB Master */
+ if (ambapp_ahbslv_first(VENDOR_GAISLER, GAISLER_APBMST, &apbmst) != 1) {
+ return 0;
+ }
+
+ /* Get APB CTRL Plug&Play info area */
+ apbmst_base = apbmst.address[0] & LEON3_IO_AREA;
+ apb = (apbctrl_pp_dev *) (apbmst_base | LEON3_CONF_AREA);
+
+ for (i = 0; i < LEON3_APB_SLAVES; i++) {
+ if ((amba_vendor(apb->conf) == vendor) &&
+ (amba_device(apb->conf) == driver) && ((index < 0)
+ || (index-- == 0))) {
+ /* Convert Plug&Play info into a more readable format */
+ cnt++;
+ if (dev) {
+ dev->irq = amba_irq(apb->conf);
+ dev->ver = amba_ver(apb->conf);
+ dev->address =
+ (apbmst_base |
+ (((apb->
+ bar & 0xfff00000) >> 12))) & (((apb->
+ bar &
+ 0x0000fff0)
+ << 4) |
+ 0xfff00000);
+ dev++;
+ }
+ /* found max devices? */
+ if (cnt >= max_cnt)
+ return cnt;
+ }
+ /* Get next Plug&Play entry */
+ apb++;
+ }
+ return cnt;
+}
+
+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)
+{
+ register int i;
+ register ahbctrl_pp_dev *apbmst;
+ register apbctrl_pp_dev *apb;
+ register unsigned int apbmst_base;
+
+ /* APBMST is a AHB Slave */
+ apbmst = ambapp_ahb_next_nomem(VENDOR_GAISLER, GAISLER_APBMST, 1, 0);
+ if (!apbmst)
+ return 0;
+
+ apbmst_base = amba_membar_start(apbmst->bars[0]);
+ if (amba_membar_type(apbmst->bars[0]) == AMBA_TYPE_AHBIO)
+ apbmst_base = AMBA_TYPE_AHBIO_ADDR(apbmst_base);
+ apbmst_base &= LEON3_IO_AREA;
+
+ /* Find the vendor/driver device on the first APB bus */
+ apb = (apbctrl_pp_dev *) (apbmst_base | LEON3_CONF_AREA);
+
+ for (i = 0; i < LEON3_APB_SLAVES; i++) {
+ if ((amba_vendor(apb->conf) == vendor) &&
+ (amba_device(apb->conf) == driver) && ((index < 0)
+ || (index-- == 0))) {
+ /* Convert Plug&Play info info a more readable format */
+ return (apbmst_base | (((apb->bar & 0xfff00000) >> 12)))
+ & (((apb->bar & 0x0000fff0) << 4) | 0xfff00000);
+ }
+ /* Get next Plug&Play entry */
+ apb++;
+ }
+ return 0;
+}
+
+/****************************** APB SLAVES ******************************/
+
+int ambapp_apb_count(unsigned int vendor, unsigned int driver)
+{
+ return ambapp_apb_scan(vendor, driver, NULL, 0, LEON3_APB_SLAVES);
+}
+
+int ambapp_apb_first(unsigned int vendor,
+ unsigned int driver, ambapp_apbdev * dev)
+{
+ return ambapp_apb_scan(vendor, driver, dev, 0, 1);
+}
+
+int ambapp_apb_next(unsigned int vendor,
+ unsigned int driver, ambapp_apbdev * dev, int index)
+{
+ return ambapp_apb_scan(vendor, driver, dev, index, 1);
+}
+
+int ambapp_apbs_first(unsigned int vendor,
+ unsigned int driver, ambapp_apbdev * dev, int max_cnt)
+{
+ return ambapp_apb_scan(vendor, driver, dev, 0, max_cnt);
+}
+
+enum {
+ AHB_SCAN_MASTER = 0,
+ AHB_SCAN_SLAVE = 1
+};
+
+/* Scan AMBA Plug&Play bus for AMBA AHB Masters or AHB Slaves
+ * for a certain matching Vendor and Device ID.
+ *
+ * Return number of devices found.
+ *
+ * Compact edition...
+ */
+static int ambapp_ahb_scan(unsigned int vendor, /* Plug&Play Vendor ID */
+ unsigned int driver, /* Plug&Play Device ID */
+ ambapp_ahbdev * dev, /* Result(s) is placed here */
+ int index, /* Index of device to start copying Plug&Play
+ * info into dev
+ */
+ int max_cnt, /* Maximal count that dev can hold, if dev
+ * is NULL function will stop scanning after
+ * max_cnt devices are found.
+ */
+ int type /* Selectes what type of devices to scan.
+ * 0=AHB Masters
+ * 1=AHB Slaves
+ */
+ )
+{
+ int i, j, cnt = 0, max_pp_devs;
+ unsigned int addr;
+ ahbctrl_info *info = (ahbctrl_info *) (LEON3_IO_AREA | LEON3_CONF_AREA);
+ ahbctrl_pp_dev *ahb;
+
+ if (max_cnt == 0)
+ return 0;
+
+ if (type == 0) {
+ max_pp_devs = LEON3_AHB_MASTERS;
+ ahb = info->masters;
+ } else {
+ max_pp_devs = LEON3_AHB_SLAVES;
+ ahb = info->slaves;
+ }
+
+ for (i = 0; i < max_pp_devs; i++) {
+ if ((amba_vendor(ahb->conf) == vendor) &&
+ (amba_device(ahb->conf) == driver) &&
+ ((index < 0) || (index-- == 0))) {
+ /* Convert Plug&Play info info a more readable format */
+ cnt++;
+ if (dev) {
+ dev->irq = amba_irq(ahb->conf);
+ dev->ver = amba_ver(ahb->conf);
+ dev->userdef[0] = ahb->userdef[0];
+ dev->userdef[1] = ahb->userdef[1];
+ dev->userdef[2] = ahb->userdef[2];
+ for (j = 0; j < 4; j++) {
+ addr = amba_membar_start(ahb->bars[j]);
+ if (amba_membar_type(ahb->bars[j]) ==
+ AMBA_TYPE_AHBIO)
+ addr =
+ AMBA_TYPE_AHBIO_ADDR(addr);
+ dev->address[j] = addr;
+ }
+ dev++;
+ }
+ /* found max devices? */
+ if (cnt >= max_cnt)
+ return cnt;
+ }
+ /* Get next Plug&Play entry */
+ ahb++;
+ }
+ return cnt;
+}
+
+unsigned int ambapp_ahb_get_info(ahbctrl_pp_dev * ahb, int info)
+{
+ register unsigned int ret;
+
+ if (!ahb)
+ return 0;
+
+ switch (info) {
+ default:
+ info = 0;
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ /* Get Address from PnP Info */
+ ret = amba_membar_start(ahb->bars[info]);
+ if (amba_membar_type(ahb->bars[info]) == AMBA_TYPE_AHBIO)
+ ret = AMBA_TYPE_AHBIO_ADDR(ret);
+ return ret;
+ }
+ return 0;
+
+}
+
+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, /* 1=slave, 0=master */
+ register int index)
+{
+ register ahbctrl_pp_dev *ahb;
+ register ahbctrl_info *info =
+ (ahbctrl_info *) (LEON3_IO_AREA | LEON3_CONF_AREA);
+ register int i;
+ register int max_pp_devs;
+
+ if (opts == 0) {
+ max_pp_devs = LEON3_AHB_MASTERS;
+ ahb = info->masters;
+ } else {
+ max_pp_devs = LEON3_AHB_SLAVES;
+ ahb = info->slaves;
+ }
+
+ for (i = 0; i < max_pp_devs; i++) {
+ if ((amba_vendor(ahb->conf) == vendor) &&
+ (amba_device(ahb->conf) == driver) &&
+ ((index < 0) || (index-- == 0))) {
+ /* Convert Plug&Play info info a more readable format */
+ return ahb;
+ }
+ /* Get next Plug&Play entry */
+ ahb++;
+ }
+ return 0;
+}
+
+/****************************** AHB MASTERS ******************************/
+int ambapp_ahbmst_count(unsigned int vendor, unsigned int driver)
+{
+ /* Get number of devices of this vendor&device ID */
+ return ambapp_ahb_scan(vendor, driver, NULL, 0, LEON3_AHB_MASTERS,
+ AHB_SCAN_MASTER);
+}
+
+int ambapp_ahbmst_first(unsigned int vendor, unsigned int driver,
+ ambapp_ahbdev * dev)
+{
+ /* find first device of this */
+ return ambapp_ahb_scan(vendor, driver, dev, 0, 1, AHB_SCAN_MASTER);
+}
+
+int ambapp_ahbmst_next(unsigned int vendor,
+ unsigned int driver, ambapp_ahbdev * dev, int index)
+{
+ /* find first device of this */
+ return ambapp_ahb_scan(vendor, driver, dev, index, 1, AHB_SCAN_MASTER);
+}
+
+int ambapp_ahbmsts_first(unsigned int vendor,
+ unsigned int driver, ambapp_ahbdev * dev, int max_cnt)
+{
+ /* find first device of this */
+ return ambapp_ahb_scan(vendor, driver, dev, 0, max_cnt,
+ AHB_SCAN_MASTER);
+}
+
+/****************************** AHB SLAVES ******************************/
+int ambapp_ahbslv_count(unsigned int vendor, unsigned int driver)
+{
+ /* Get number of devices of this vendor&device ID */
+ return ambapp_ahb_scan(vendor, driver, NULL, 0, LEON3_AHB_SLAVES,
+ AHB_SCAN_SLAVE);
+}
+
+int ambapp_ahbslv_first(unsigned int vendor, unsigned int driver,
+ ambapp_ahbdev * dev)
+{
+ /* find first device of this */
+ return ambapp_ahb_scan(vendor, driver, dev, 0, 1, AHB_SCAN_SLAVE);
+}
+
+int ambapp_ahbslv_next(unsigned int vendor,
+ unsigned int driver, ambapp_ahbdev * dev, int index)
+{
+ /* find first device of this */
+ return ambapp_ahb_scan(vendor, driver, dev, index, 1, AHB_SCAN_SLAVE);
+}
+
+int ambapp_ahbslvs_first(unsigned int vendor,
+ unsigned int driver, ambapp_ahbdev * dev, int max_cnt)
+{
+ /* find first device of this */
+ return ambapp_ahb_scan(vendor, driver, dev, 0, max_cnt, AHB_SCAN_SLAVE);
+}
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