diff options
Diffstat (limited to 'drivers/power/fvp_pwrc.c')
| -rw-r--r-- | drivers/power/fvp_pwrc.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/power/fvp_pwrc.c b/drivers/power/fvp_pwrc.c new file mode 100644 index 0000000..c7db33b --- /dev/null +++ b/drivers/power/fvp_pwrc.c @@ -0,0 +1,103 @@ +/* + * Copyright (c) 2013, ARM Limited. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <string.h> +#include <stdio.h> +#include <errno.h> +#include <assert.h> +#include <arch_helpers.h> +#include <platform.h> +#include <fvp_pwrc.h> +#include <bakery_lock.h> + +/* + * TODO: Someday there will be a generic power controller api. At the moment + * each platform has its own pwrc so just exporting functions is fine. + */ +static bakery_lock pwrc_lock __attribute__ ((section("tzfw_coherent_mem"))); + +unsigned int fvp_pwrc_get_cpu_wkr(unsigned long mpidr) +{ + unsigned int rc = 0; + bakery_lock_get(mpidr, &pwrc_lock); + mmio_write_32(PWRC_BASE + PSYSR_OFF, (unsigned int) mpidr); + rc = PSYSR_WK(mmio_read_32(PWRC_BASE + PSYSR_OFF)); + bakery_lock_release(mpidr, &pwrc_lock); + return rc; +} + +unsigned int fvp_pwrc_read_psysr(unsigned long mpidr) +{ + unsigned int rc = 0; + bakery_lock_get(mpidr, &pwrc_lock); + mmio_write_32(PWRC_BASE + PSYSR_OFF, (unsigned int) mpidr); + rc = mmio_read_32(PWRC_BASE + PSYSR_OFF); + bakery_lock_release(mpidr, &pwrc_lock); + return rc; +} + +void fvp_pwrc_write_pponr(unsigned long mpidr) +{ + bakery_lock_get(mpidr, &pwrc_lock); + mmio_write_32(PWRC_BASE + PPONR_OFF, (unsigned int) mpidr); + bakery_lock_release(mpidr, &pwrc_lock); +} + +void fvp_pwrc_write_ppoffr(unsigned long mpidr) +{ + bakery_lock_get(mpidr, &pwrc_lock); + mmio_write_32(PWRC_BASE + PPOFFR_OFF, (unsigned int) mpidr); + bakery_lock_release(mpidr, &pwrc_lock); +} + +void fvp_pwrc_write_pwkupr(unsigned long mpidr) +{ + bakery_lock_get(mpidr, &pwrc_lock); + mmio_write_32(PWRC_BASE + PWKUPR_OFF, + (unsigned int) (PWKUPR_WEN | mpidr)); + bakery_lock_release(mpidr, &pwrc_lock); +} + +void fvp_pwrc_write_pcoffr(unsigned long mpidr) +{ + bakery_lock_get(mpidr, &pwrc_lock); + mmio_write_32(PWRC_BASE + PCOFFR_OFF, (unsigned int) mpidr); + bakery_lock_release(mpidr, &pwrc_lock); +} + +/* Nothing else to do here apart from initializing the lock */ +int fvp_pwrc_setup(void) +{ + bakery_lock_init(&pwrc_lock); + return 0; +} + + + |