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360 lines
9.8 KiB
C
360 lines
9.8 KiB
C
/* Gaisler AMBA Plug&Play bus scanning. Functions
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* ending on _nomem is inteded to be used only during
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* initialization, only registers are used (no ram).
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*
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* (C) Copyright 2007
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* Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <ambapp.h>
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#if defined(CONFIG_CMD_AMBAPP)
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extern void ambapp_print_apb(apbctrl_pp_dev * apb,
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ambapp_ahbdev * apbmst, int index);
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extern void ambapp_print_ahb(ahbctrl_pp_dev * ahb, int index);
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extern int ambapp_apb_print;
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extern int ambapp_ahb_print;
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#endif
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static int ambapp_apb_scan(unsigned int vendor, /* Plug&Play Vendor ID */
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unsigned int driver, /* Plug&Play Device ID */
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ambapp_apbdev * dev, /* Result(s) is placed here */
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int index, /* Index of device to start copying Plug&Play
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* info into dev
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*/
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int max_cnt /* Maximal count that dev can hold, if dev
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* is NULL function will stop scanning after
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* max_cnt devices are found.
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*/
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)
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{
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int i, cnt = 0;
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unsigned int apbmst_base;
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ambapp_ahbdev apbmst;
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apbctrl_pp_dev *apb;
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if (max_cnt == 0)
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return 0;
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/* Get AMBA APB Master */
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if (ambapp_ahbslv_first(VENDOR_GAISLER, GAISLER_APBMST, &apbmst) != 1) {
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return 0;
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}
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/* Get APB CTRL Plug&Play info area */
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apbmst_base = apbmst.address[0] & LEON3_IO_AREA;
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apb = (apbctrl_pp_dev *) (apbmst_base | LEON3_CONF_AREA);
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for (i = 0; i < LEON3_APB_SLAVES; i++) {
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#if defined(CONFIG_CMD_AMBAPP)
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if (ambapp_apb_print && amba_vendor(apb->conf)
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&& amba_device(apb->conf)) {
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ambapp_print_apb(apb, &apbmst, i);
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}
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#endif
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if ((amba_vendor(apb->conf) == vendor) &&
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(amba_device(apb->conf) == driver) && ((index < 0)
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|| (index-- == 0))) {
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/* Convert Plug&Play info into a more readable format */
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cnt++;
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if (dev) {
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dev->irq = amba_irq(apb->conf);
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dev->ver = amba_ver(apb->conf);
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dev->address =
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(apbmst_base |
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(((apb->
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bar & 0xfff00000) >> 12))) & (((apb->
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bar &
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0x0000fff0)
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<< 4) |
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0xfff00000);
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dev++;
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}
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/* found max devices? */
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if (cnt >= max_cnt)
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return cnt;
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}
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/* Get next Plug&Play entry */
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apb++;
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}
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return cnt;
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}
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unsigned int ambapp_apb_next_nomem(register unsigned int vendor, /* Plug&Play Vendor ID */
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register unsigned int driver, /* Plug&Play Device ID */
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register int index)
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{
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register int i;
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register ahbctrl_pp_dev *apbmst;
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register apbctrl_pp_dev *apb;
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register unsigned int apbmst_base;
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/* APBMST is a AHB Slave */
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apbmst = ambapp_ahb_next_nomem(VENDOR_GAISLER, GAISLER_APBMST, 1, 0);
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if (!apbmst)
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return 0;
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apbmst_base = amba_membar_start(apbmst->bars[0]);
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if (amba_membar_type(apbmst->bars[0]) == AMBA_TYPE_AHBIO)
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apbmst_base = AMBA_TYPE_AHBIO_ADDR(apbmst_base);
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apbmst_base &= LEON3_IO_AREA;
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/* Find the vendor/driver device on the first APB bus */
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apb = (apbctrl_pp_dev *) (apbmst_base | LEON3_CONF_AREA);
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for (i = 0; i < LEON3_APB_SLAVES; i++) {
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if ((amba_vendor(apb->conf) == vendor) &&
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(amba_device(apb->conf) == driver) && ((index < 0)
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|| (index-- == 0))) {
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/* Convert Plug&Play info info a more readable format */
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return (apbmst_base | (((apb->bar & 0xfff00000) >> 12)))
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& (((apb->bar & 0x0000fff0) << 4) | 0xfff00000);
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}
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/* Get next Plug&Play entry */
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apb++;
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}
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return 0;
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}
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/****************************** APB SLAVES ******************************/
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int ambapp_apb_count(unsigned int vendor, unsigned int driver)
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{
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return ambapp_apb_scan(vendor, driver, NULL, 0, LEON3_APB_SLAVES);
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}
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int ambapp_apb_first(unsigned int vendor,
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unsigned int driver, ambapp_apbdev * dev)
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{
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return ambapp_apb_scan(vendor, driver, dev, 0, 1);
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}
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int ambapp_apb_next(unsigned int vendor,
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unsigned int driver, ambapp_apbdev * dev, int index)
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{
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return ambapp_apb_scan(vendor, driver, dev, index, 1);
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}
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int ambapp_apbs_first(unsigned int vendor,
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unsigned int driver, ambapp_apbdev * dev, int max_cnt)
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{
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return ambapp_apb_scan(vendor, driver, dev, 0, max_cnt);
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}
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enum {
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AHB_SCAN_MASTER = 0,
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AHB_SCAN_SLAVE = 1
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};
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/* Scan AMBA Plug&Play bus for AMBA AHB Masters or AHB Slaves
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* for a certain matching Vendor and Device ID.
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*
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* Return number of devices found.
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*
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* Compact edition...
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*/
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static int ambapp_ahb_scan(unsigned int vendor, /* Plug&Play Vendor ID */
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unsigned int driver, /* Plug&Play Device ID */
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ambapp_ahbdev * dev, /* Result(s) is placed here */
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int index, /* Index of device to start copying Plug&Play
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* info into dev
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*/
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int max_cnt, /* Maximal count that dev can hold, if dev
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* is NULL function will stop scanning after
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* max_cnt devices are found.
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*/
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int type /* Selectes what type of devices to scan.
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* 0=AHB Masters
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* 1=AHB Slaves
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*/
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)
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{
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int i, j, cnt = 0, max_pp_devs;
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unsigned int addr;
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ahbctrl_info *info = (ahbctrl_info *) (LEON3_IO_AREA | LEON3_CONF_AREA);
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ahbctrl_pp_dev *ahb;
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if (max_cnt == 0)
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return 0;
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if (type == 0) {
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max_pp_devs = LEON3_AHB_MASTERS;
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ahb = info->masters;
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} else {
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max_pp_devs = LEON3_AHB_SLAVES;
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ahb = info->slaves;
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}
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for (i = 0; i < max_pp_devs; i++) {
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#if defined(CONFIG_CMD_AMBAPP)
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if (ambapp_ahb_print && amba_vendor(ahb->conf) &&
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amba_device(ahb->conf)) {
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ambapp_print_ahb(ahb, i);
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}
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#endif
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if ((amba_vendor(ahb->conf) == vendor) &&
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(amba_device(ahb->conf) == driver) &&
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((index < 0) || (index-- == 0))) {
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/* Convert Plug&Play info info a more readable format */
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cnt++;
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if (dev) {
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dev->irq = amba_irq(ahb->conf);
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dev->ver = amba_ver(ahb->conf);
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dev->userdef[0] = ahb->userdef[0];
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dev->userdef[1] = ahb->userdef[1];
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dev->userdef[2] = ahb->userdef[2];
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for (j = 0; j < 4; j++) {
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addr = amba_membar_start(ahb->bars[j]);
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if (amba_membar_type(ahb->bars[j]) ==
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AMBA_TYPE_AHBIO)
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addr =
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AMBA_TYPE_AHBIO_ADDR(addr);
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dev->address[j] = addr;
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}
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dev++;
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}
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/* found max devices? */
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if (cnt >= max_cnt)
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return cnt;
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}
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/* Get next Plug&Play entry */
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ahb++;
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}
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return cnt;
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}
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unsigned int ambapp_ahb_get_info(ahbctrl_pp_dev * ahb, int info)
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{
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register unsigned int ret;
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if (!ahb)
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return 0;
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switch (info) {
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default:
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info = 0;
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case 0:
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case 1:
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case 2:
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case 3:
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/* Get Address from PnP Info */
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ret = amba_membar_start(ahb->bars[info]);
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if (amba_membar_type(ahb->bars[info]) == AMBA_TYPE_AHBIO)
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ret = AMBA_TYPE_AHBIO_ADDR(ret);
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return ret;
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}
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return 0;
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}
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ahbctrl_pp_dev *ambapp_ahb_next_nomem(register unsigned int vendor, /* Plug&Play Vendor ID */
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register unsigned int driver, /* Plug&Play Device ID */
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register unsigned int opts, /* 1=slave, 0=master */
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register int index)
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{
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register ahbctrl_pp_dev *ahb;
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register ahbctrl_info *info =
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(ahbctrl_info *) (LEON3_IO_AREA | LEON3_CONF_AREA);
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register int i;
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register int max_pp_devs;
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if (opts == 0) {
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max_pp_devs = LEON3_AHB_MASTERS;
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ahb = info->masters;
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} else {
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max_pp_devs = LEON3_AHB_SLAVES;
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ahb = info->slaves;
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}
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for (i = 0; i < max_pp_devs; i++) {
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if ((amba_vendor(ahb->conf) == vendor) &&
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(amba_device(ahb->conf) == driver) &&
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((index < 0) || (index-- == 0))) {
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/* Convert Plug&Play info info a more readable format */
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return ahb;
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}
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/* Get next Plug&Play entry */
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ahb++;
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}
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return 0;
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}
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/****************************** AHB MASTERS ******************************/
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int ambapp_ahbmst_count(unsigned int vendor, unsigned int driver)
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{
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/* Get number of devices of this vendor&device ID */
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return ambapp_ahb_scan(vendor, driver, NULL, 0, LEON3_AHB_MASTERS,
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AHB_SCAN_MASTER);
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}
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int ambapp_ahbmst_first(unsigned int vendor, unsigned int driver,
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ambapp_ahbdev * dev)
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{
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/* find first device of this */
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return ambapp_ahb_scan(vendor, driver, dev, 0, 1, AHB_SCAN_MASTER);
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}
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int ambapp_ahbmst_next(unsigned int vendor,
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unsigned int driver, ambapp_ahbdev * dev, int index)
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{
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/* find first device of this */
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return ambapp_ahb_scan(vendor, driver, dev, index, 1, AHB_SCAN_MASTER);
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}
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int ambapp_ahbmsts_first(unsigned int vendor,
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unsigned int driver, ambapp_ahbdev * dev, int max_cnt)
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{
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/* find first device of this */
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return ambapp_ahb_scan(vendor, driver, dev, 0, max_cnt,
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AHB_SCAN_MASTER);
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}
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/****************************** AHB SLAVES ******************************/
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int ambapp_ahbslv_count(unsigned int vendor, unsigned int driver)
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{
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/* Get number of devices of this vendor&device ID */
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return ambapp_ahb_scan(vendor, driver, NULL, 0, LEON3_AHB_SLAVES,
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AHB_SCAN_SLAVE);
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}
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int ambapp_ahbslv_first(unsigned int vendor, unsigned int driver,
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ambapp_ahbdev * dev)
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{
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/* find first device of this */
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return ambapp_ahb_scan(vendor, driver, dev, 0, 1, AHB_SCAN_SLAVE);
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}
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int ambapp_ahbslv_next(unsigned int vendor,
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unsigned int driver, ambapp_ahbdev * dev, int index)
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{
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/* find first device of this */
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return ambapp_ahb_scan(vendor, driver, dev, index, 1, AHB_SCAN_SLAVE);
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}
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int ambapp_ahbslvs_first(unsigned int vendor,
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unsigned int driver, ambapp_ahbdev * dev, int max_cnt)
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{
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/* find first device of this */
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return ambapp_ahb_scan(vendor, driver, dev, 0, max_cnt, AHB_SCAN_SLAVE);
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}
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