diff options
Diffstat (limited to 'libgloss/sparc_leon/amba_driver.c')
| -rw-r--r-- | libgloss/sparc_leon/amba_driver.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libgloss/sparc_leon/amba_driver.c b/libgloss/sparc_leon/amba_driver.c new file mode 100644 index 000000000..0340e94a3 --- /dev/null +++ b/libgloss/sparc_leon/amba_driver.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2011 Aeroflex Gaisler + * + * BSD license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + + +#include <asm-leon/leon.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +/*#define DEBUG_CONFIG*/ + +/* Structure containing address to devices found on the Amba Plug&Play bus */ +extern amba_confarea_type amba_conf; + +/*collect apb slaves*/ +int +amba_get_free_apbslv_devices (int vendor, int device, amba_apb_device * dev, + int nr) +{ + unsigned int i, conf, iobar, j = 0; +#ifdef DEBUG_CONFIG + printf ("Apbslv: search for apdslv devices\n"); +#endif + for (i = 0; i < amba_conf.apbslv.devnr && j < nr; i++) + { + conf = amba_get_confword (amba_conf.apbslv, i, 0); +#ifdef DEBUG_CONFIG + printf ("Apbslv: check(%x:%x)==(%x:%x)\n", vendor, device, + amba_vendor (conf), amba_device (conf)); +#endif + if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) + { + if (!(amba_conf.apbslv.allocbits[i / 32] & (1 << (i & (32 - 1))))) + { +#ifdef DEBUG_CONFIG + printf ("Apbslv: alloc device idx %i (%x:%x)\n", + j, vendor, device); +#endif + amba_conf.apbslv.allocbits[i / 32] |= (1 << (i & (32 - 1))); + dev[j].irq = amba_irq (conf); + iobar = amba_apb_get_membar (amba_conf.apbslv, i); + dev[j].start = + amba_iobar_start (amba_conf.apbslv.apbmst[i], iobar); +#ifdef DEBUG_CONFIG + printf (" +bar: 0x%x \n", k, dev[j].start); +#endif + j++; + } + } + } + return j; +} + +/*collect ahb slaves*/ +int +amba_get_free_ahbslv_devices (int vendor, int device, amba_ahb_device * dev, + int nr) +{ + unsigned int addr, i, conf, iobar, j = 0, k; +#ifdef DEBUG_CONFIG + printf ("Ahbslv: search for ahdslv devices\n"); +#endif + for (i = 0; i < amba_conf.ahbslv.devnr && j < nr; i++) + { + conf = amba_get_confword (amba_conf.ahbslv, i, 0); +#ifdef DEBUG_CONFIG + printf ("Ahbslv: check(%x:%x)==(%x:%x)\n", vendor, device, + amba_vendor (conf), amba_device (conf)); +#endif + if ((amba_vendor (conf) == vendor) && (amba_device (conf) == device)) + { + if (!(amba_conf.ahbslv.allocbits[i / 32] & (1 << (i & (32 - 1))))) + { +#ifdef DEBUG_CONFIG + printf ("Ahbslv: alloc device idx %i (%x:%x)\n", + j, vendor, device); +#endif + amba_conf.ahbslv.allocbits[i / 32] |= (1 << (i & (32 - 1))); + dev[j].irq = amba_irq (conf); + for (k = 0; k < 4; k++) + { + iobar = amba_ahb_get_membar (amba_conf.ahbslv, i, k); + addr = amba_membar_start (iobar); + if (amba_membar_type (iobar) == AMBA_TYPE_AHBIO) + { + addr = AMBA_TYPE_AHBIO_ADDR (addr); + } + dev[j].start[k] = addr; +#ifdef DEBUG_CONFIG + printf (" +%i: 0x%x \n", k, dev[j].start[k]); +#endif + } + j++; + } + } + } + return j; +} |